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  • Welding is the key factor which restrict the construction speed and quality.

    长输管道建设中，焊接是制约施工速度和施工质量的关键环节。

    youdao

  • The power factor of PWM are welding power source has been discussed in this paper.

    本文讨论了脉宽调制(PWM)逆变式弧焊电源的功率因数。

    youdao

  • The power factor of PWM are welding power source has been discussed in this paper.

    本文讨论了脉宽调制(PWM)逆变式弧焊电源的功率因数。

    youdao

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