资料来源 : pyDict

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资料来源 : Webster's Revised Unabridged Dictionary (1913)

Pulsometer \Pul*som"e*ter\, n. [Pulse + -meter.]
   1. A device, with valves, for raising water by steam, partly
      by atmospheric pressure, and partly by the direct action
      of the steam on the water, without the intervention of a
      piston; -- also called {vacuum pump}.