U fasten tseem hu ua U-shaped bolt, U bolt clamp, lossis U bolt bracelet. Vim qhov kev ua tau zoo heev thiab tus nqi qis, U bolt yog ib qho zoo heev steel fastener thoob plaws hauv kev lag luam. Lub hom phiaj ntawm U fasten yog dab tsi? Thaum koj rhuav tshem nws, U-fasten yog lub ntsia liaj qhov rooj khoov rau hauv cov duab ntawm tsab ntawv "u ...
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