Install new lower barrel, place new snap ring and new flange on the new lower barrel, fixed by bolt nut.

安装新埋管，把新卡环和新法兰套进新埋管里，用螺栓螺母与法兰固定。

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Install new lower barrel, place new snap ring and new flange on the new lower barrel, fixed by bolt nut.

安装新埋管，把新卡环和新法兰套进新埋管里，用螺栓螺母与法兰固定。

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