Nrhiav tubular stranding tshuab rau koj cov hlua hlau ntau lawm? Peb cov cav tov yog qhov zoo tagnrho rau kev siv xws li elevator ropes, mine ropes, crane ropes, nuv ntses ropes, choj ropes thiab cable tsheb ropes. Nrog rau peb txoj kev cog lus rau kev ua tau zoo, koj tuaj yeem so assured th...
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