3003 3004 3105 3A21 Antirust Coating Roofing Aluminum ...
3003 3004 3105 3A21 Antirust Coating Roofing Aluminum Corrugated Sheets 3A21 aluminum plate sheet belongs to Al-Mn aluminum alloy is a kind of widely used anti rust aluminum the intensity is not high (only slightly higher than that of pure aluminum)...
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