A water system, usually small, in which a water pump is automatically controlled (started and stopped) by the air pressure in a compressed-air tank.
HYDROPNEUMATIC (HI-DRO-NEW-MAT-ICK)
Meaning of HYDROPNEUMATIC (HI-DRO-NEW-MAT-ICK) in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012