The invention has the advantages that t the problem of material blockage can be solved since the cross section of the combined barrel is in a segmental shape.
本发明具有如下优点：由于组合筒体横截面呈圆缺形，所以能解决组合筒体堵料问题。
The invention has the advantages that t the problem of material blockage can be solved since the cross section of the combined barrel is in a segmental shape.
本发明具有如下优点：由于组合筒体横截面呈圆缺形，所以能解决组合筒体堵料问题。
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