Niaj hnub nimno siv ntawm lub laub bolts

Hauv lub neej tam sim no, carriage bolts yog dav siv. Piv txwv li, hauv kev kho vaj tse hauv tsev, cov rooj ntoo khoom ntoo thiab cov chaw sab nraum zoov yog tsau nrog cov tsheb pob zeb; Hauv Nroog Infrastrasure, Tsheb thauj cov chaw tsheb, hluav taws xob, hloov tsheb ciav hlau, thiab lwm yam kuj siv cov khoom siv bolts hauv cov khoom loj; Nyob rau hauv kev lag luam teb, carriage bolts tuaj yeem pom nyob rau hauv kev ua liaj ua teb Tsis tas li ntawd, pob laub puas tseem muaj cov yam ntxwv ntawm lub zog siab, xeb tsis kam, thiab anti-tub sab, uas ua rau lawv ua lub luag haujlwm tseem ceeb hauv kev lag luam niaj hnub no.