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1·The rubber in a helical rotor pump stator is a key element to decide its life and efficiency.

单螺杆泵定子橡胶是决定泵寿命和效率的关键部件。

2·The technology of manufacture about helical rotor is vital to the manufacture of various helical poles, such as helic-borer and helic-pump.

螺旋转子制造技术是各种螺旋杆机械如螺旋杆钻具、螺旋泵等设备制造中的一项关键技术。