The flared end is then drawn up by the tube nut so the inside surface is tightly secured against the ball seat of the fitting.

接着通过管道螺母将扩口端拔出使其内部表面与管件球座紧密结合。

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The tube nut is placed over the end of the copper tube to be joined; the tube end then is flared out at an approximate 45 degree Angle by a flaring tool.

管道螺母放置在连接铜管的末端端口上，然后采用扩口工具将管道端口扩口成45度角。

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