F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F04
POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
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F04D
NON-POSITIVE-DISPLACEMENT PUMPS
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F04D29/00
Details, component parts, or accessories
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F04D29/66
Combating cavitation, whirls, noise, vibration or the like; Balancing
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F04D29/661
especially adapted for elastic fluid pumps
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F04D29/663
Sound attenuation
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