What does pumpless mean?
Pumpless means Without a pump..
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Pronunciation varies by accent · adjective
Without a pump..
Between Paris and Lyons the substation rectifiers were multi-anode units with vacuum pumps, either water- or air-cooled (the pumpless type having come later into general use on the Continent than in Britain and being first used for main-line traction in France in 1953).
Use pumpless when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pumpless means Without a pump..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Between Paris and Lyons the substation rectifiers were multi-anode units with vacuum pumps, either water- or air-cooled (the pumpless type having come later into general use on the Continent than in Britain and being first used for main-line traction in France in 1953).
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