The invention relates to a circular duct butt-welding rapid spotting and locating device and a circular duct butt-welding method.
本发明涉及一种圆管对焊快速找正定位装置及圆管对焊方法。
The invention relates to a circular duct butt-welding rapid spotting and locating device and a circular duct butt-welding method.
本发明涉及一种圆管对焊快速找正定位装置及圆管对焊方法。
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