Polish the cut off area of the sand, insert it into the water, there should be no air bubbles, then wipe and apply the flux.
砂皮打光截断处，插入水中，应没有气泡，然后揩干并涂上助焊剂。
Solder (or gas)
用焊锡(或气焊）
Seal the process port of the compressor, which can be welded into a tin ball to avoid leakage.
封住压缩机的工艺口，可焊成锡球状，以免渗漏。
③ The process mouth of the compressor should be sealed and then immersed in water, there should be no bubbles.
③将封住压缩机的工艺口处再浸人水中，应没有气泡。
And then you take this part of the liquid copper tube that's sealed,
然后将封好口的这段加液铜管，
Use the cone handle to make the core wound into a spring shape.
用锥柄做芯绕成弹簧状即可。
