Move flame back and forth as alloy is drawn into joint. When the proper temperature is reached alloy will flow readily into space between tube outer wall and valve socket.
达到适当的温度后，合金将迅速容易地流进管道外壳和阀门套管之间的空间。
Move flame back and forth as alloy is drawn into joint. When the proper temperature is reached alloy will flow readily into space between tube outer wall and valve socket.
达到适当的温度后，合金将迅速容易地流进管道外壳和阀门套管之间的空间。
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