Remove flame and feed solder into the joint at one or two points until a ring of solder appears at the end of the fitting.
把火焰移开，在连接部位一或两点位置将焊料注入直到管件端口出现一环焊料为止。
Remove flame and feed solder into the joint at one or two points until a ring of solder appears at the end of the fitting.
把火焰移开，在连接部位一或两点位置将焊料注入直到管件端口出现一环焊料为止。
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