标签：JCOE - 英国华人论坛

Straight seam submerged arc JCOE welded steel pipe: with the difference between the high frequency straight seam steel pipe welding process, molding process, the scope of production, production materials, use of industry. In appearance also...英国华人论坛

Straight seam submerged arc JCOE welded steel pipe: with the difference between the ERW steel pipe welding process, molding process, the scope of production, production materials, use of industry. In appearance also has a bright appearance...英国华人论坛