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Screw threads tuaj yeem pom nyob rau hauv ntau yam khoom siv tshuab. Lawv muaj ntau yam kev siv. Muaj ntau yam khoom muaj rau lawv. Lawv tuaj yeem siv rau fastening. Screws, txiv ntseej-bolts thiab studs uas muaj cov ntsia hlau threads yog siv los kho ib ntus mus rau lwm qhov. Lawv siv rau j...Nyeem ntxiv»
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Siv daim duab peb sab xov xov fasteners, cov hniav hom txoj kab uas hla xov thiab cov ntsiab lus tag nrho cov txheej txheem load hu ua txheem threads, kam rau siab nrog tus qauv xov thiab cov xov cim tau standardized, thiab cov xov tooj thiab cov kev taw qhia ntawm cov xov, yog hais tias tsis yog lwm yam hais, tus tib d . Yog...Nyeem ntxiv»
