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。
Consequently it is difficult to optimize the welding pressure in pressure constant mode used in conventional ultrasonic plastic welder.
传统焊机的压力不变模式使得焊接工艺很难优化。
Consequently it is difficult to optimize the welding pressure in pressure constant mode used in conventional ultrasonic plastic welder.
传统焊机的压力不变模式使得焊接工艺很难优化。
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