- 手动下降阀
- operate: vi. 1.操作，工作；(机械等)动作；运转。 2.起作 ...
- down: down3 n. 1.(装被、褥等用的)鸭绒 ...
- valve: n. 1.【机械工程】阀，活门，舌门；汽门。 2.【解剖 ...
- manually operated control valve: 手动控制阀
- manually operated valve: 手动操纵阀; 手动阀
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manually operated down valve中文什么意思
发音:
- 手动下降阀
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