PVC pob tshab steel hlau hose txais cov khoom siv tam sim no ntawm PVC, uas muaj kev ua haujlwm siab dua thiab tawv, thiab tuaj yeem hloov cov kav dej zoo tib yam, PE kav thiab qee cov kav hlau.Cov khoom no yog siv dav hauv tshuaj, tiv thaiv, kev tsim khoom thiab lwm yam lag luam, thiab tau dhau los ua ...
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