manhole n.人孔人孔;进人孔...ladder to manhole 人孔梯子...quick-opening manhole 快开人孔...quick opening manhole 快开人孔...inlet manhole 人孔入口...dome manhole 圆顶人孔...dome center manhole 储罐中部的人孔...manhole with flat cover 平盖人孔...shell manhole 壳体人孔...cover plate for manhole 人孔盖板...manhole with sight glass 带视镜人孔...pipe manhole 管道检查井;管道检查孔...manhole cover 人孔盖...manhole dog 人孔栓...
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