Official Answer
Answer
Hanyar 'Mandrel da Sleeve' ita ce ma'aunin masana'antu don hana yawan damuwa na zobe yayin taro. Ana sanya madaidaicin madauri a kan ƙarshen ramin, kuma hannun riga yana tura zobe sama da tef ɗin har sai ya shiga cikin ramin. Matsakaicin kusurwa yakamata ya kasance ƙasa da $10^{\circ}$ don rage ƙarfin radial da ake buƙata. Wannan hanya tana tabbatar da cewa an faɗaɗa zobe daidai. Idan aka yi amfani da filaye a maimakon haka, damuwa yana mai da hankali $180^{\circ}$ daga buɗewa, sau da yawa yana wuce wurin da ake samarwa kuma yana haifar da zoben 'sako' wanda ba shi da isasshen 'manne' a gindin tsagi.
