辅助杆位于推板的两侧确保管材的前进方向。
Auxiliary Pole: work with direction wheel at bottom of push board, ensure pipe moving direction.
作用；往复推板式机构，理饼机率高于95%。
Function, Reciprocating push board, Richard bread than 95% probability.
作用；往复推板式机构，理饼机率高于95%。
Function, Reciprocating push board, Richard bread than 95% probability.
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