由镀锌或镀铝锌合金的薄钢板冷弯滚压成型，截面按照相应的国家规范确定。

Galvanized by galvanized or cold-formed alloy steel sheet roll forming, cross-section determined in accordance with the corresponding national norms.

youdao

由镀锌或镀铝锌合金的薄钢板冷弯滚压成型，截面按照相应的国家规范确定。

Galvanized by galvanized or cold-formed alloy steel sheet roll forming, cross-section determined in accordance with the corresponding national norms.

youdao