Cov qauv hlau rub rivets yog tus cwj pwm los ntawm:
Nws muaj kev ua tau zoo ntawm qhov txhaws, cua nruj zoo thiab lub zog riveting siab.
Cov sijhawm siv ntawm cov qauv hlau rub rivets:
Nws yog qhov tsim nyog rau cov teb riveting nrog cov kev xav tau siab ntawm qhov chaw, cov kev xav tau siab riveting thiab cov kev xav tau kev ua haujlwm sealing.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-17-2021