During this time, the screw moves back while turning to carry out a new proportioning by bringing material melted to the front of the sprue tube.

在这段时间里，螺杆回复到原位，同时旋转以实现下一环节的动作，即将熔化的材料带入进胶管前端。

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During this time, the screw moves back while turning to carry out a new proportioning by bringing material melted to the front of the sprue tube.

在这段时间里，螺杆回复到原位，同时旋转以实现下一环节的动作，即将熔化的材料带入进胶管前端。

youdao