现货供应 BQB303-2009-结构用热连轧钢板及钢带 SM400A SM400B SM440C SM490A SM490B SM490C SM490YA SM490YB SM520B SM520C SM570 BSM590 B590GJA B590GJB B520JJ B750GJ STE255 STE285 STE355
BQB303-2009-结构用热连轧钢板及钢带 C22 C35 S20C S35C S45C SPHT1 SPHT2 SPHT3 SPHT4
规格齐全
现货供应 BQB303-2009-结构用热连轧钢板及钢带 SM400A SM400B SM440C SM490A SM490B SM490C SM490YA SM490YB SM520B SM520C SM570 BSM590 B590GJA B590GJB B520JJ B750GJ STE255 STE285 STE355
BQB303-2009-结构用热连轧钢板及钢带 C22 C35 S20C S35C S45C SPHT1 SPHT2 SPHT3 SPHT4
规格齐全