Dab tsi yog qhov cuam tshuam laum siv rau?

Tuscuam ​​tshuam tsav' kev ua haujlwm nchuav yog kom tsav cov fasteners loj. Ntev screws thiab, nrog theuseof ib qho kev hloov kho, lag bolts tuaj yeem tsav hauv qhov yooj yim dua los ntawm tus tsav tsheb animpact.