Kodi kusiyanitsa zomangira, mabawuti ndi mtedza?
Maonekedwe osiyana 1. Screw: Mtundu wokhala ndi kutsogolo kutsogolo, ndi phula lalikulu komanso mawonekedwe ozungulira ozungulira. 2. Bolt: cylindrical threaded fastener yokhala ndi mtedza, kuphatikizapo mutu wa hexagonal, mutu wozungulira, mutu wapakati, mutu wa countersunk, etc. 3. Mtedza ...
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