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мм вод.ст. stresses
Makarov.	millimeter of water (9,80665 Па)
мм вод. ст.
mil.	mm WG (millimeter of water gauge (mm WG) another common name for the millimeter of water column. The word "gauge" (or 'gage') after a pressure reading indicates that the pressure stated is actually the difference between the absolute, or total, pressure and the air pressure at the time of the reading. Found on unc.edu Alexander Demidov)
tech.	mm H2O; mm w.g. (SergeyFomin)
Russian thesaurus
мм вод.ст.
abbr.	миллиметр водяного столба
abbr., tech.	миллиметр водяного столба
мм вод. ст.
abbr.	миллиметр водного столба