... threshold capillary pressure 临界毛细管压力 threshold displacement pressure 启动驱替压力 threshold effect 阈效应 ...
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A displacement threshold was used to control DC upset butt welding process, and constant pressure and varied pressure tests were carried out on Q235 a steel strips.
采用位移门槛电压控制焊接过程，对Q 235 - A钢进行了变压式和等压式扁钢带直流电阻对焊试验。
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