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BqB 310

钢管用钢带钢Q/BQB 303SPHT1SPHT2SPHT3JIS G3132SPHT1SPHT2SPHT3用于焊接钢管。汽车结构用钢Q/BQB 310BZJ 311BZJ 312BZJ 313BZJ 314SAPH 310SAPH 370SAPH ...

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