Stack Rings
Here are Todays Amazing Stack Rings Deals
![]() |
![]() Barbara Bixby Three Stack Rings 18k Gold Silver Size 7 NEW Never Worn $165.00 Time Remaining: 22h 49m Buy It Now for only: $191.50 Buy It Now | Bid now | Add to watch list |
![]() ROMAN ART DESIGNER HAMMERED STACK RING 24K YELLOW GOLD OVER STERLING SILVER $52.00 Time Remaining: 6d 13h 43m Buy It Now for only: $52.00 Buy It Now | Add to watch list |
![]() Heidi Daus Fab Four Set of 4 Crystal Band Rings Size 10 $39.99 Time Remaining: 23h 42m Buy It Now for only: $65.00 Buy It Now | Bid now | Add to watch list |
![]() Hagit Gorali Blush Pearl Button Wave Stack Ring 9 SALE $29.95 Time Remaining: 1d 35m Bid now | Add to watch list |
![]() authentic Juicy Couture PAVE GOLD CROWN CHARM SILVER WISH RING Size 7 z510 NEW $34.99 Time Remaining: 20d 7h 48m Buy It Now for only: $34.99 Buy It Now | Add to watch list |
![]() Hagit Gorali Grey Pearl Button Wave Stack qvc Ring 8 SALE $29.95 (1 Bid) Time Remaining: 1d 1h 7m Bid now | Add to watch list |
![]() MICHAEL DAWKINS STERLING BEZEL SET RHODOLITE GEMSTONE STACK RING $29.99 Time Remaining: 1d 2h 46m Bid now | Add to watch list |
![]() Authentic Pandora Gold Bands Size 7 $175.00 Time Remaining: 2d 7m Buy It Now for only: $175.00 Buy It Now | Add to watch list |
![]() Barbara Bixby White Pearl Ring 18k 925 NEW Size 9 $109.00 Time Remaining: 1d 22h 8m Buy It Now for only: $120.00 Buy It Now | Bid now | Add to watch list |
![]() Barbara Bixby Honora Pearl Ring Ring 18k 925 NEW w Tags sz 9 $140.00 Time Remaining: 2d 16m Buy It Now for only: $155.00 Buy It Now | Bid now | Add to watch list |
![]() KENNETH DAVID Pure Love Diamond Sterling 24K Wedding Stacking Band Ring Size 10 $10.99 (3 Bids) Time Remaining: 2d 33m Bid now | Add to watch list |
![]() COACH Gold Black Enamel Stacked Ring Set Size 7 NEW $54.99 Time Remaining: 26d 18h 25m Buy It Now for only: $54.99 Buy It Now | Add to watch list |
![]() Estate Aquamarine Sterling Solitaire Ring with Baguette Eternity Band Size 7 $40.00 (23 Bids) Time Remaining: 2d 39m Bid now | Add to watch list |
![]() Premier Designs HOSTESS CHARM Bracelet Antiqued Silver NEW $6.50 (4 Bids) Time Remaining: 2d 42m Bid now | Add to watch list |
![]() authentic Juicy Couture Pearl Wedding Cake Gold Bracelet Charm z506 new in box $39.99 Time Remaining: 29d 18h 55m Buy It Now for only: $39.99 Buy It Now | Add to watch list |
![]() Silpada Sterling Silver Size 8 Stack Rings Set of 5 $28.00 (4 Bids) Time Remaining: 2d 1h 2m Bid now | Add to watch list |
![]() IVANKA TRUMP 18K White Gold BRACELET White Enamel Signature Oval 1990 GORGEOUS $750.00 Time Remaining: 2d 2h 1m Buy It Now for only: $1,695.00 Buy It Now | Bid now | Add to watch list |
![]() MICHAEL DAWKINS STERLING DROP BEZEL SET GEMSTONE STACK RING SIZES 5 6 8 10 $29.99 Time Remaining: 2d 2h 36m Bid now | Add to watch list |
![]() HANDMADE DESIGNER EMERALD STACK RING BY OMER 24K GOLD OVER 925 STERLING SILVER $88.00 Time Remaining: 2d 14h 32m Buy It Now for only: $88.00 Buy It Now | Add to watch list |
![]() Pomellato Solid 18k Gold Natural Diamond Ring Size 5 Authentic Signed $329.00 Time Remaining: 2d 3h 2m Buy It Now for only: $375.00 Buy It Now | Bid now | Add to watch list |
![]() Wendy Mink New w package Three Stack Rings in Gold Rare Size 8 $45.00 Time Remaining: 3d 1h 54m Bid now | Add to watch list |
![]() NWT COACH STACKED RING SET BLACK GOLD 95745 SZ 7 100 Authentic $53.00 Time Remaining: 6d 19h 11m Buy It Now for only: $53.00 Buy It Now | Add to watch list |
![]() 925 STERLING SILPADA 5 STACKABLE STACK RINGS SIZE 7 WITH RETIRED PEARL RING $120.00 Time Remaining: 3d 17h 27m Buy It Now for only: $135.00 Buy It Now | Bid now | Add to watch list |
![]() Barbara Bixby Garnet and Flower Stack Ring Size 7 Sterling 18K YG $89.99 Time Remaining: 4d 3h 3m Bid now | Add to watch list |
![]() DIAN MALOUF RING STACK SET STERLING SILVER 14K GOLD GREEN STONE SIZE 6 $345.00 Time Remaining: 4d 16h 15m Buy It Now for only: $380.00 Buy It Now | Bid now | Add to watch list |
![]() 48 Juicy Couture Heart Charm Safety Pin Gold Starter Bracelet z508 authentic $31.99 Time Remaining: 19d 4h 4m Buy It Now for only: $31.99 Buy It Now | Add to watch list |
![]() DLM Sterling Silver Stack Ring DLM Size 65 vtg $35.00 Time Remaining: 4d 19h 49m Buy It Now for only: $45.00 Buy It Now | Bid now | Add to watch list |
![]() Set of 2 MILOR ITALY Rings Diamond Cut Sterling 925 Sizes 775 8 $9.00 Time Remaining: 5d 17h 29m Bid now | Add to watch list |
![]() HAMMERED HANDMADE CHROME DIOPSIDE STACK RING 24K GOLD OVER STERLING SILVER $54.00 Time Remaining: 2d 14h 45m Buy It Now for only: $54.00 Buy It Now | Add to watch list |
![]() Dara Ettinger orange green and blue stacked ring set Retail 300 $140.00 Time Remaining: 5d 21h 51m Buy It Now for only: $175.00 Buy It Now | Bid now | Add to watch list |
![]() QVC DIAMONIQUE NADRI STUD EARRINGS NORDSTROM GOLD TRICOLOR CRYSTAL STACK RINGS $9.95 (1 Bid) Time Remaining: 6d 21m Bid now | Add to watch list |
![]() Rare Silpada Peridot Amethyst Rings Size 6 3 4 925 Oxidized Silver Nice $52.00 Time Remaining: 6d 12h 40m Bid now | Add to watch list |
![]() Juicy Couture Crystal Strawberry Whip cream charm z509 $29.99 Time Remaining: 28d 6h 21m Buy It Now for only: $29.99 Buy It Now | Add to watch list |
![]() Penny Preville 18k Marquise Garland ring syle R6213W $1,549.00 Time Remaining: 6d 20h 57m Bid now | Add to watch list |
![]() ANN KING Sterling Silver Passion Pattern Stack Ring Size 8 NEW RETIRED $59.99 (1 Bid) Time Remaining: 2h 4m Bid now | Add to watch list |
![]() GENUINE ROUGH SAPPHIRE STACK RING BY OMER 24K GOLD OVER 925 STERLING SILVER $84.00 Time Remaining: 6d 19h 31m Buy It Now for only: $84.00 Buy It Now | Add to watch list |
![]() Lisa Jenks stackable ring 925 silver dot pattern Sz 7 $45.00 Time Remaining: 6d 23h 3m Bid now | Add to watch list |
![]() Lisa Jenks stackable ring 925 silver lines pattern Sz 7 $45.00 Time Remaining: 6d 23h 7m Bid now | Add to watch list |
![]() Juicy Couture Pink Pave Rhinestone Heart Gold Wish Necklace YJRU5314 z504 $31.99 Time Remaining: 6d 2h 28m Buy It Now for only: $31.99 Buy It Now | Add to watch list |
![]() Lisa Jenks stackable ring 925 silver single line pattern Sz 65 $45.00 Time Remaining: 6d 23h 11m Bid now | Add to watch list |
![]() David Yurman 925 8mm DY Elements Stack Diamond Ring Size 6 $349.00 Time Remaining: 17h 10m Bid now | Add to watch list |
![]() Judith Ripka Diamonique Band Ring Sz 6 $50.00 Time Remaining: 18h 31m Buy It Now for only: $60.00 Buy It Now | Bid now | Add to watch list |
![]() HANDMADE UNIQUE TURQUOISE STACK RINGS SET BY OMER 24K GOLD OVER STERLING SILVER $90.00 Time Remaining: 6d 16h 16m Buy It Now for only: $90.00 Buy It Now | Add to watch list |
![]() Brighton Flowers Scroll Design Stack Ring Sz 7 $43.00 Time Remaining: 20h 44m Buy It Now for only: $50.00 Buy It Now | Bid now | Add to watch list |
![]() NWT Hagit Gorali Sterling Cultured Peacock Pearl Wave Stack Ring Size 8 RT 80 $49.99 Time Remaining: 1d 30m Bid now | Add to watch list |
![]() 24K GOLD OVER STERLING SILVER DESIGNER JEWELRY AMETHYST STACK RING BY OMER $49.00 Time Remaining: 4d 3h 5m Buy It Now for only: $49.00 Buy It Now | Add to watch list |
![]() MICHAEL DAWKINS STERLING BEZEL SET LONDON BLUE STACK RING SZ 10 $26.99 Time Remaining: 1d 2h 27m Bid now | Add to watch list |
![]() Ann King 18K Paradise WHITE TOPAZ Stack qvc Ring 9 NWT SALE $62.50 (1 Bid) Time Remaining: 1d 3h 4m Bid now | Add to watch list |
![]() MICHAEL DAWKINS STERLING BEZEL SET SMOKY QUARTZ STACK RING SZ 5 $26.99 Time Remaining: 1d 4h 47m Bid now | Add to watch list |
![]() 24K SOLID HAMMERED GOLD GENUINE RUBY SOLITAIRE STACK DESIGNER RING BY OMER 22K $890.00 Time Remaining: 6d 20h 56m Buy It Now for only: $890.00 Buy It Now | Add to watch list |
![]() MICHAEL DAWKINS STERLING BEZEL SET LONDON BLUE STACK RING SZ 5 $26.99 Time Remaining: 1d 4h 47m Bid now | Add to watch list |
![]() Lois Hill Sterling Silver Stack Rings 3 Size 8 $79.99 Time Remaining: 1d 16h 13m Buy It Now for only: $99.99 Buy It Now | Bid now | Add to watch list |
![]() New 125 Janice Girardi Set 5 Sterling Silver Stack Rings Size 7 Beaded Scroll $59.99 Time Remaining: 18d 17h 8m Buy It Now for only: $59.99 Buy It Now | Add to watch list |
![]() ROBERT LEE MORRIS RLM STUDIO 14K YELLOW GOLD STERLING SILVER 925 RING SIZE 9 $329.00 Time Remaining: 1d 21h 52m Bid now | Add to watch list |
![]() PANDORA Silver 14K Gold DIAMOND Stack Smooth RING BAND Med 6 3 4 190213D $90.00 (1 Bid) Time Remaining: 2d 17m Bid now | Add to watch list |
![]() Unusual BRIGHTON NECKLACE Silver GOLD Pendant w Adjustable Chain Great Detail $13.00 (3 Bids) Time Remaining: 2d 1h 3m Bid now | Add to watch list |
![]() Juicy Couture Engagement Ring Charm Starter Silver Chain Necklace z510 authentic $59.99 Time Remaining: 28d 6h 21m Buy It Now for only: $59.99 Buy It Now | Add to watch list |
![]() 2 DaRLing STERLING Silver RINGS Squiggles Hearts 925 SIZE 85 Bands 2 STACK $21.97 (3 Bids) Time Remaining: 2d 1h 3m Bid now | Add to watch list |
![]() FABULOUS STEPHEN DWECK PURPLE QUARTZ BRONZE SETTING RING $100.00 (1 Bid) Time Remaining: 2d 2h 58m Bid now | Add to watch list |
![]() ROMAN ART AMETHYST STACK RING 24K YELLOW GOLD OVER STERLING SILVER BY OMER $49.00 Time Remaining: 6d 14h Buy It Now for only: $49.00 Buy It Now | Add to watch list |
![]() MICHAEL DAWKINS STERLING BEZEL SET RHODOLITE STACK RING SZ 7 $26.99 (1 Bid) Time Remaining: 2d 4h 38m Bid now | Add to watch list |
![]() Juicy Couture Blue Alarm Clock Bracelet silver Charm RARE z504 authentic $13.50 (13 Bids) Time Remaining: 2d 16h 3m Bid now | Add to watch list |
![]() Brand New Kate Spade Gold Bow Ring Size 8 $20.50 (2 Bids) Time Remaining: 2d 18h 37m Bid now | Add to watch list |
![]() DESIGNER PINK TOPAZ SOLITARE RING 24K YELLOW GOLD OVER STERLING SILVER BY OMER $85.00 Time Remaining: 6d 13h 54m Buy It Now for only: $85.00 Buy It Now | Add to watch list |
![]() PANDORA Silver 14K Gold DIAMOND Stack Smooth RING BAND Med 6 65 52 $145.00 Time Remaining: 2d 20h 53m Bid now | Add to watch list |
![]() authentic Juicy Couture Gold Chihuahua Dog Bracelet Charm rare + box z508 $8.61 (6 Bids) Time Remaining: 3d 1h 23m Bid now | Add to watch list |
![]() Classic Dian Malouf Sterling Silver Turquoise Chunky Ring Retail 610 $299.99 Time Remaining: 27d 20h 38m Buy It Now for only: $299.99 Buy It Now | Add to watch list |
![]() Joan Rivers 5 Color Changeable Crystal Flower Ring Size 6 Goldtone $14.99 Time Remaining: 3d 2h 7m Bid now | Add to watch list |
![]() Betsey Johnson Dark Forest Stacked Animal Ring Bunny Deer and Bear $29.75 Time Remaining: 3d 2h 20m Buy It Now for only: $34.99 Buy It Now | Bid now | Add to watch list |
![]() GREEN TOURMALINE HAMMERED STACK RING 24K YELLOW GOLD OVER 925 K SILVER BY OMER $80.00 Time Remaining: 6d 14h 1m Buy It Now for only: $80.00 Buy It Now | Add to watch list |
![]() Estate Lagos Caviar sterling 18k Arcadia Ring 7 $165.00 Time Remaining: 3d 19h 18m Buy It Now for only: $185.00 Buy It Now | Bid now | Add to watch list |
![]() JAMES AVERY STERLING SILVER AMOR STACKED RING $9.99 (1 Bid) Time Remaining: 4d 2h 19m Bid now | Add to watch list |
![]() Ann King Sterling 18K Clad Passion Pattern Stack Ring Size 7 $49.99 Time Remaining: 4d 16h 55m Bid now | Add to watch list |
![]() authentic JUICY COUTURE Bow Heart Charm Starter Bracelet GOLD z509 $37.99 Time Remaining: 20d 7h 43m Buy It Now for only: $37.99 Buy It Now | Add to watch list |
![]() Authentic Juicy Couture Pyramid Stack Ring Set Size 8 YJRU4944 78 IN BOX $10.50 (4 Bids) Time Remaining: 4d 23h 5m Bid now | Add to watch list |
![]() DAVID YURMAN STERLING SILVER BLUE SAPPHIRE METRO RING Size 5 $359.00 Time Remaining: 4d 23h 37m Buy It Now for only: $399.00 Buy It Now | Bid now | Add to watch list |
![]() 42 Juicy Couture French Macaroon Cookie Charm RARE z506 $29.99 Time Remaining: 25d 19h 18m Buy It Now for only: $29.99 Buy It Now | Add to watch list |
![]() Ann King London Blue Topaz stack ring sterling 18K Clad ring size 6 $69.00 Time Remaining: 5d 7m Bid now | Add to watch list |
![]() Tiffany Co18kSAPPHIREstackRING $37.00 (15 Bids) Time Remaining: 5d 43m Bid now | Add to watch list |
![]() GUESS 3 STACK BOW RINGSIZE 8 $15.00 Time Remaining: 5d 4h 15m Bid now | Add to watch list |
![]() authentic Juicy Couture PAVE GOLD CROWN CHARM SILVER WISH RING SIZE 6 z510 NEW $34.99 Time Remaining: 13d 7h 2m Buy It Now for only: $34.99 Buy It Now | Add to watch list |
![]() authentic Juicy Couture Sewing Machine Gold Bracelet Charm YJRUO425 z511 NIB $20.50 (15 Bids) Time Remaining: 5d 16h 2m Bid now | Add to watch list |
![]() authentic Juicy Couture Crown with J Insert Gold Bracelet Charm YJRU4052 z505 $4.25 (6 Bids) Time Remaining: 5d 16h 3m Bid now | Add to watch list |
![]() authentic Juicy Couture Buddha Mini Silver Bracelet Charm z502 $17.99 Time Remaining: 21d 15h 33m Buy It Now for only: $17.99 Buy It Now | Add to watch list |
![]() authentic Juicy Couture Pave Vampire Lips Silver Charm Limited Edition 2011 z508 $8.50 (8 Bids) Time Remaining: 5d 18h 55m Bid now | Add to watch list |
![]() Lia sophia set of 3 rings Kiam collection size 5 retails 98 $49.99 Time Remaining: 6d 59m Buy It Now for only: $65.00 Buy It Now | Bid now | Add to watch list |
![]() Tiffany Co Elsa Peretti Platinum Diamond Stacking Ring Retails 1225 Size 4 $599.99 Time Remaining: 6d 1h 51m Buy It Now for only: $800.00 Buy It Now | Bid now | Add to watch list |
![]() authentic Juicy Couture silver butterfly MINI CHARM z501 $9.99 Time Remaining: 28d 14h 41m Buy It Now for only: $9.99 Buy It Now | Add to watch list |
![]() Estate Signed 14K White Gold Diamond Anniversary Stack Band Ring Size 725 $9.99 (1 Bid) Time Remaining: 9d 1h 5m Bid now | Add to watch list |
![]() Reinstein Ross Gold and Diamond Band $999.00 Time Remaining: 9d 1h 58m Buy It Now for only: $1,199.00 Buy It Now | Bid now | Add to watch list |
![]() Estate Tiffany Co Platinum Diamond Band Ring Peretti Fine Designer Jewelry 55 $1,095.00 Time Remaining: 4d 21h 39m Buy It Now for only: $1,095.00 Buy It Now | Add to watch list |
![]() Judith Ripka Sterling Silver Set of 3 Diamonique Pave Stack Rings Size 7 $150.00 Time Remaining: 6d 17h 28m Bid now | Add to watch list |
![]() Epiphany Platinum Clad Sterling Silver Diamonique 3 pc Stack Set Ring 7 QVC 224 $78.99 Time Remaining: 6d 19h 56m Bid now | Add to watch list |
![]() Epiphany Sterling Silver Diamonique 3 pc Eternity Stack Set Rings 7 QVC 214 $74.99 Time Remaining: 6d 19h 56m Bid now | Add to watch list |
![]() Betsey Johnson Dark Forest Critter Ring $28.99 Time Remaining: 4d 1m Buy It Now for only: $28.99 Buy It Now | Add to watch list |
![]() James Avery RETIRED 14K Gold Bamboo Stackable Ring $69.99 Time Remaining: 6d 21h 23m Bid now | Add to watch list |
![]() JUICY COUTURE LOVE MYSELF BETTER THAN YOU STACK RING BNIB SIZE 6 $89.00 Time Remaining: 6d 23h 2m Bid now | Add to watch list |
![]() HANDMADE YELLOW TOPAZ STACK RING 24K YELLOW GOLD OVER STERLING SILVER BY OMER $135.00 Time Remaining: 2d 22h 39m Buy It Now for only: $135.00 Buy It Now | Add to watch list |
![]() David Yurman Sterling Silver 18K Yellow Gold Cable X Stack Band Ring Sz 6 NR $81.00 (5 Bids) Time Remaining: 7d 17h 46m Bid now | Add to watch list |
![]() GREAT JUDITH RIPKA STERLING SILVER AND 3 STONE CZ RING SIZE 9 $69.99 Time Remaining: 9d 21h 3m Buy It Now for only: $89.99 Buy It Now | Bid now | Add to watch list |
More Great Information on Stack Rings:
Cartridge seal stack by Maggie
A cartridge seal stack utilizes a plurality of rotary cartridge seals each including a cold flowable plastic ring having a body for sealably engaging a housing bore and a lip for sealably engaging a shaft rotating within the housing bore.
A spring is provided and disposed between the body and the lip for biasing the lip against the shaft and a separable metal retainer is provided for fixing the plastic ring within the housing bore and around the shaft. The separable metal retainer includes a surface of revolution with a rear portion having a radius suitable for press fitting into the housing bore and a front portion of lesser radius ending the ring. An internal groove is provided in the body of the plastic ring for engaging the ring in order to latch the plastic ring and metal retainer together. A spring portion connecting the retainer rear portion and the ring is provided for controlling residual stress in a radial direction within the plastic ring and preventing shrinkage of the plastic ring toward the shaft.
The present invention generally relates to a stack of cartridge rotary seals that are pressed into a housing and provide a seal around a shaft at relatively low pressures under various fluid environments. More particularly, the present invention is directed to a stack of cartridge seals mounted in a housing or on a shaft, which are designed primarily for use in reciprocating, rotary and static applications.
Cartridge rotary seals have been used for many years in a variety of applications for the sealing of various types of fluids and gases. Generally these seals use an elastomer as the seal material and such elastomer is molded and bonded to a supporting metal ring.
The materials described in this application utilize various types of plastics, such as ploytetrafluoroethylene PTFE because it exhibits relatively low friction and it is chemically inert and can withstand a variety of temperatures, thus enabling their use under conditions with no lubrication. Other plastic materials may be used, such as ultra high molecular weight polyethylene, but it has limited temperature capabilities and limited chemical compatibility with a high degree of friction.
The prior art cartridge seals utilized the elastomer in a bonded relationship and continuous tube bears around the shaft.
As hereinabove noted, when plastics are utilized, like PTFE, the plastic is mechanically retained to the metallic ring and the entire assembly is pressed into the housing with a high degree of interference between the OD of the seal and the housing to permit retention of the seal assembly into the housing and at the same time, providing static sealing against the housing. Dynamic sealing between the seal and the shaft is provided by the contact between the plastic and the shaft.
A common problem with the prior art is that the elastomer when subjected to heat, produced a high degree of friction and wear and also have limited chemical compatibility that limits the life of the seal and can cause seal failure.
Heretofore seals have been stacked between a housing and the shaft in order to enhance overall sealing therebetween. Generally, the type of seals that have been used for stacking are known as "V-Rings". Such rings are circular and have a "V" cross section. The rings are stacked with a hard support ring that bears against a housing end. The V-Rings stack is generally made from the elastomeric materials or combinations of elastomeric materials as well as plastics, such as PTFE and combinations thereof. Unfortunately, fluid pressure applied to the stack is transmitted equally throughout the entire seal stack so all seals were subject to the fluid pressure. In addition, heretofore, seals stacks utilizing V-Rings provide for no radial adjustment. Accordingly, as the seals wear, leakage increases and eventually the replacement of the seals is necessary due to such leakage.
The present invention provides for a seal stack assembly in which pressure is concentrated on a primary seal while other seals in the stack provide other functions, such as better sealing, longer life of variations and design, etc. Accordingly, the seal stack in accordance with the present invention can withstand fluid pressure with little deformation.
The rotary cartridge seal stack assembly in accordance with the present invention generally includes a plurality of rotary cartridge seals disposed in an abutting relationship with one another, the plurality of cartridge seals being disposed between a housing bore in a shaft.
In one embodiment, each of the cartridge seal include a cold flowable plastic ring having body means for sealably engaging a housing bore and lip means for sealably engaging a shaft rotating within the housing bore. Separable metal retainer rings are provided for fixing the plastic ring between the housing bore and around the shaft with the separable metal retainer means each having a surface of revolution with a rear portion having a radius suitable for press fitting into the housing bore.
Although there has been hereinabove described a specific embodiment of a rotary cartridge seal stack in accordance with the present invention, for the purpose of illustrating the manner in which the invention may be used to advantage, it should be appreciated that the invention is not limited thereto.
Ningbo Yinzhou Guowei, mechanical seal Component Factory is a professional engaged in the design, development, manufacture, sale of various cartridge seal and flygt seals business. Production and testing are well-equipped with a high-quality staff.
Article Source: http://www.earticlesonline.com/Article/Cartridge-seal-stack/842742




































































































