Round taub hau dig muag rivets tsis xav tau chamfering, lawv yuav protrude los ntawm qhov chaw tom qab riveting, thaum countersunk taub hau dig muag rivets yuav tsum tau chamfered los ntawm 120 °, thiab lawv yuav nyob rau tib lub dav hlau raws li lub phaj tom qab riveting.
Lub sij hawm xa tuaj: Mar-31-2022