Yuav ua li cas qhia qib ntawm vuam hlau: Vuam hlau muaj xws li carbon hlau rau vuam, hlau alloy hlau rau vuam, stainless hlau rau vuam, thiab lwm yam. Txoj kev qhia cov qib yog ntxiv cov cim "H" rau lub taub hau ntawm txhua hom. welding steel qib. Piv txwv li, H08, H08Mn2Si, H1...
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