a manhole cover.
出入孔盖。
a manhole cover.
出入孔盖。
he lifted the manhole cover and peered into the depths beneath.
他掀起窨井盖向下面深处望。
inspectors can lamp the lines between the manholes for routine maintenance observations.
员能够照亮修孔之间线路进行日常维修观察。
Body has handhole (or manhole) for easy wash and examination, And bottle valve set up inlet/outlet valve,safety valve, pressure gauge and pressure gauge valve, drain valve etc.
筒体上设有手孔(或人孔),以便清理、修。瓶头阀上设有进气阀、出气阀,安全阀、压力表和压力表阀、泄放阀等。
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