... 上排污阀 surface blow-down valve 底部排污阀 bottom blow down valve 上 (下) 部吹除阀 surface(bottom)blow-off valve ...
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bottom blow down valve
底部排污阀
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The manual withdrawal device realizes the withdrawal and discharging on the withdrawal objects by driving the bottom frame and the blow off valve to move up and down through the pull rod.
本实用新型通过拉杆 带动底阀、排空阀的上、下运动，实现对抽取对象的抽取排出。
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