Cov lag luam twg yog qhib-kawg puag ncig lub taub hau dig muag rivets feem ntau siv hauv?

Cov teb thov ntawm qhib lub taub hau puag ncig dig muag rivets:

Kev tsim tsheb npav, kev tsim kho, electromechanical, shipbuilding, txee, tsheb tsim, khoom siv hauv tsev thiab lwm yam lag luam.