n. reducer
misc. adapter bonnet ; reducer pipe
下部人孔、烟口、冷风口入口、转折管、变径管等。
Lower manhole, smoke vent, cold-blast inlet, transition pipe, telescoping pipeline, etc.
当进水管直径大于水泵进水口时，应安装偏心变径管。
When the inlet diameter is greater than pump inlet should be installed eccentric adjustable tube.
提出了在不影响壶口瀑布风景区景观下，建立有压变径长管引水发电站及电解铝系统，巧妙地利用水能创造效益的方案。
Suggestions on building a power station by drawing water with pressured reducing long pipes and a electrolytic aluminum system were proposed, which had no effect on the Hukou waterfall scenic spot.
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