介绍在纺丝螺杆挤压机的调速方法中，用交流变频调速代替直流调速。
The method of AC frequency-converting speed-governing of spinning screw was introduced in stead of DC speed-governing method.
介绍在纺丝螺杆挤压机的调速方法中，用交流变频调速代替直流调速。
The method of AC frequency-converting speed-governing of spinning screw was introduced in stead of DC speed-governing method.
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