Kujerar Cin Abinci Rollerback kujera ce ta cin abinci wadda aka tsara domin ta dace da jikin mutane iri-iri daban-daban. Matashin kai na baya yana juyawa cikin walwala a kan sanda, don haka mai zama zai iya karkata baya ya samo matsayi na zama daban-daban yayin da yake ci gaba da samun goyon baya. An hada firam din ta hanyar soldarwa da sandar karfe mai tsauri, kuma an lika fatar dabba a kan matashin kai na musamman da aka yi da roba. Sifar kujerar ta hada siffofi guda uku na asali, wato triangle (mai kusurwa uku), da'ira, da murabba'i mai tsayi, don samar da kamanni mai sauki. Rollerback na da nufin sa cin abinci ya kara jin dadi ta hanyar barin motsi maimakon zama a wuri daya kawai.

Sunan aikin : Rollerback, Sunan masu zanen kaya : Timothy Hardman, Sunan abokin ciniki : .

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