A kan kayan aikin injin, akwai wani ɓangaren da aka yi da sandunan ƙarfe na bakin ciki da tsayi.Wani fili ne mai tsayin daka, kuma wasu suna da zaren.Gabaɗaya, zaren da ke kan kayan aikin injin ana kiransa dunƙule gubar.1. Bisa ga ma'auni na kasa GB/T17587.3-1998 da misalan aikace-aikacensa, ƙwallon sc ...
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