Keep flame away from rod or wire as it is fed into the joint. Move flame back and forth as alloy is drawn into joint.

　
英 美
  • 當焊桿或焊線(xiàn)進(jìn)入連接處時(shí)要將火焰從其上面移開(kāi)。當合金流進(jìn)連接處時(shí),要前后移動(dòng)火焰。
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