The electric machine impels the injection unit to move forward with spring and touches the spout and the model.
电动机通过弹簧使注射单元前进，使喷嘴与模具抵接。
As for disadvantages, it requires a special nozzle and check ring to accommodate material coming back into the injection unit.
至于缺点，它需要一个特别的喷嘴和挡圈来容纳材料的回退。
As for disadvantages, it requires a special nozzle and check ring to accommodate material coming back into the injection unit.
至于缺点，它需要一个特别的喷嘴和挡圈来容纳材料的回退。
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