Yuav ua li cas paub qhov txawv screws, bolts thiab ceev?
Cov tsos mob sib txawv 1. Ntsia Hlau: Hom uas muaj qhov taw qhia pem hauv ntej kawg, nrog lub suab loj dua thiab ib qho kev sib hloov ntawm lub voj voog. 2. Bolt: cylindrical threaded fastener nrog txiv ntseej, nrog rau lub taub hau hexagonal, puag ncig lub taub hau, square taub hau, countersunk taub hau, thiab lwm yam. 3. Txiv ntseej ...
saib kom meej