设计中还采用了多种形式的相贯节点，包括圆管正偏心的间隙接头及方管的搭接接头。

Varied types of intersecting joints, including gap joint with positive eccentricity for the circular tubes and overlap joint for the square tubes, were also adopted in the design.

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在该系统中，焊丝穿过电机的空心轴后从导电嘴的偏心孔送出，电机带动导电杆和偏心导电嘴旋转，从而使焊丝端部的电弧以一定直径高速旋转，以保证窄间隙焊接接头具有足够的侧壁熔深。

The hollow-axis motor drives the offset nozzle and rotates the arc on the tip of wire at high speed, so as to ensure enough penetration into the sidewalls in narrow gap welding.

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