Aerohydrodynamics in Fluidics [English Subtitles] (Аэрогидродинамические эффекты в пневмонике)
Channel: BlueJersey112
Date: 30/06/2018

An old educational film from the USSR on Fluidics and how they work. The video ends with a visual demonstration of a fluid-type of check valve for a respirator. Pretty interesting find.

Here is the best book on Fluidic Technology and how to design different circuits/systems that I have found so far:
https://archive.org/details/BELSTERLINGFluidicSystemsDesign1971