Bag ɗin kofi na gefe mai lalacewa

Tsarin samar da jakar da aka rufe ta gefe guda huɗu: ninka gefen huɗu na jakar da aka rufe ta yau da kullun zuwa saman ciki na ɓangarorin biyu, sannan a ninka jakar da aka rufe ta zuwa murabba'i mai kusurwa huɗu, wanda aka kammala. Bayan naɗewa, gefen jakar yana kama da ganyen da aka naɗe, amma an rufe shi. Dangane da bayyanar jakar, ana kiranta jakar da aka rufe ta gefe guda huɗu.
Amfanin jakunkuna huɗu da aka rufe a gefe sune kamar haka:
1. Rage yawan filaye yadda ya kamata. Ninka dukkan bangarorin aljihun da ke ciki domin rage yawan faɗuwar ɓangarorin biyu da kuma rage sararin marufi.
2. Yana da kyawawan marufi. An gyara aljihun lebur ɗin, kuma an canza buɗewar jakar asali mai siffar oval zuwa murabba'i mai kusurwa huɗu, wato, tana da cikakken kuma cike, kusa da siffar cuboid.
3. Abubuwan da aka buga sun fi na jakar lebur yawa kuma sun fi wadata. Za ka iya rina jikin jakar jakar da aka rufe guda huɗu zuwa launuka daban-daban da kake so, sannan ka buga kyawawan alamu da ka fi so a kai. Za ka iya huda rami a buɗe jakar da aka rufe guda huɗu, don samar da jakar hannu mai rufe guda huɗu!
4. Baya ga fa'idodin da ke sama, jakar lebur ta zama jaka mai rufewa mai gefe huɗu, wanda hakan kuma ke canza siffar kuma yana ƙara sha'awar masu amfani. A gefe guda kuma, tana haɓaka jakar marufi don jawo hankalin masu amfani da sha'awar siye.
Kayan da ake amfani da su gabaɗaya sune: OPP + CPP, Pet + CPP, OPP + VMCPP.

Sauran jakunkunan organ an raba su zuwa ƙasan jakar organ (kamar jakar organ a tsaye, wato naɗewa a ƙasa) da kuma jakar organ a gefe. Jakar organ a gefe jaka ce da aka naɗe a ɓangarorin biyu kuma ana iya buɗe ta bayan an ɗora ta. Jakar organ a gefe gabaɗaya jakar rufe organ a gefe ce, wato naɗewa a gefe, kuma akwai layin rufewa a tsakiyar baya.