午夜亚洲乱码伦小说区-激情偷乱人伦小说视频在线-97久久综合区小说区图片区

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    1. Industry News
      Location:Home >> News >> Industry News
      How to choose when the soldering temperature lead-free solder? How to choose the shape of the tip?
      For lead-free soldering temperature selection should take into account the thickness of the PCB board, whether the size of the pad, the device and the surrounding area have a greater cooling, suggest that the use of conventional solder temperature is selected around 350 ℃, to meet the requirements of the situation in the size of the tip of the election as much, because the larger the tip, the greater the heat capacity, the temperature can be set lower, the less heat loss. In this case the relative increase welding speed will ensure the quality of welding.
      午夜亚洲乱码伦小说区-激情偷乱人伦小说视频在线-97久久综合区小说区图片区