straight welding meaning in Chinese

直缝焊

Abstract : main aspects concerning the mechanical cold expander for straight weld pipes located at zhujiang steel tube co . , ltd . , panyu , guangdong province are described , including working principle , structural features and process operation sequence . also described are the author ' s own comments on several specific issues with respect to the development of the mill
文摘:简要介绍了广东番禺珠江钢管有限公司大口径直缝焊管生产用机械式冷扩径机的工作原理及结构特点、工艺运行程序，并对在研制过程中的几个具体问题阐述了自己的观点。