Yuav ua li cas koj tshem tawm cov Expansion Bolts?
Expansion bolts yog ib qho kev sib txuas uas siv dav hauv kev tsim kho, tshuab, hluav taws xob thiab lwm yam haujlwm. Txawm li cas los xij, vim kev siv ntev lossis lwm yam laj thawj, kev nthuav dav bolts tuaj yeem xoob, puas lossis yuav tsum tau hloov. Yog li, thaum koj ntsib qhov xwm txheej no, ...
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