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Passive Schmidt's vacuum sewerage valve
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Schmidt's pilot-controlled switch
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Suspension release weight device
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Lever and cam switchs driving clamping device
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A kind of mobile vacuum lavatory
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A kind of Passive Shape Control device in low-pressure drainage system
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A kind of remote vacuum high speed water discharge method
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A kind of remote vacuum high speed drainage system
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A kind of vacuum pipe clip valve being applied in vacuum system and its control method
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A kind of manufacture method of mobile vacuum lavatory
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With the quick low-pressure drainage system and water discharge method for opening passive vacuum blowoff valve
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The passive vacuum water discharge method and passive vacuum draining, blowoff valve device that fast can be opened
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