01 A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air or force it into a closed space.
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1.
A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air or force it into a closed space.(Physics)
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2.
A pump used to exhaust from a condenser the condensed steam, the water used for condensing, and any commingled air.(Steam Engines)