螺旋刀体，剪切轻快，调整简单。
所述螺旋型垄台清理装置安装于开沟器正前方，主要由刀轴以及焊接在刀轴上的螺旋刀组成；
The helical ridge cleaning device is arranged in front of an opener, and mainly comprises a cutter shaft and a circular knife welded on the cutter shaft;
刀划着螺旋形下降弧线，砍开一只斑溪的的肩膀。
It flutters off in a descending spiral, the shoulder of one wing hacked open.
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