单项选择题
A.压铅 B.压铝 C.装铠 D.挤出
A.0.5×30 B.0.5×35 C.0.5×45 D.0.8×60
A.普通钢带 B.涂漆钢带 C.镀锌钢带 D.预涂钢带
A.80% B.85% C.90% D.95%
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