1. Kev xaiv cov rivets dig muag tsis yog lawm. Qhov no ua tau yog tias qhov tuab uas yuav tsum tau riveted qis dua qhov tuab tshaj plaws ntawm cov rivet dig muag.
2. Qhov zoo ntawm lub rivet dig muag nws tus kheej. Qhov teeb meem no yuav tshwm sim yog tias qhov sib sau ua ke ntawm lub qhov sab hauv ntawm lub taub hau rivet tshaj 0.15 hli, lossis yog tias lub taub hau rivet raug annealed tsis sib npaug.
Lub sijhawm tshaj tawm: Lub Xya Hli-14-2022