Tshaj tawm rau 2018-05-15 Dacromet txheej txheej yog ib qho tshiab corrosion-resistant zinc-aluminium txheej nrog cov ntsev tsuag tshuaj ntsuam txog li ob peb puas teev, nws nto yog nyiaj-dawb, nyiaj-grey thiab dub.Dacromet txheej txheej muaj anti-corrosion, tshav kub tsis kam, siab permeab ...
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