“JCOE”簡單造句，JCOE造句子

This article describes the whole process of JCOE longitudinal submerged arc welding pipe made from rolling plate.

介紹了巨龍鋼管有限公司大口徑JCOE直縫埋弧焊管生產線研發情況，以及該生產線生產的直縫埋弧焊管在西氣東輸工程等重大管線中的使用效果；

The Modification to Inside Weld Grinding Machine for JCOE Formed Longitudinal Submerged Arc Welded Pipe

Bauschinger Effect of JCOE Longitudinal Submerged Arc Welding Steel Pipes;