You'll want to make sure that there is no water in the copper pipe you are soldering.
你先要确认要焊接的铜管里没有水。
2
So far, soldering iron tips have been made mainly of copper, and in order to prevent oxidization, the copper has been either iron-plated or chromlum-plated.
到目前为止，普通烙铁的焊嘴主要还是是铜，为了防止氧化，铜已经被处理加装铁皮或电镀。
3
Wrot copper performs well in high temperature applications and is easily joined by soldering or brazing.