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该产品采用优质碳素结构钢，表面镀稀土锌铝合金制造而成。
The product quality carbon structural steel, zinc-plated aluminum alloy made from rare earth.
youdao
-
该产品采用优质碳素结构钢，表面镀稀土锌铝合金制造而成。
The product quality carbon structural steel, zinc-plated aluminum alloy made from rare earth.
youdao