It is necessary to measure the deposit rate in laboratory and optimize the pigging frequency based on test results.
为了优化清蜡频率，准确预测结蜡的速度是必要的。
Cloge detection system of pigging and extrusion tools is adopting very-low-frequency radiowave emission and reception.
清管及挤涂工具的阻卡探测系统是采用甚低频无线电波发射、接收。
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