针对不同强度级别的管线钢x 70和L245对接的焊接工艺进行了研究。
A study was made of the welding procedure for X70-L245 butt joint of pipeline steel.
本发明还公开了一种采用该装置进行对接的方法。
The invention also discloses a method for butt joint by using the unit.
本发明还公开了一种采用该装置进行对接的方法。
The invention also discloses a method for butt joint by using the unit.
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