Air is let through the regulator:
-
The work of oxygen equipment, the release of
-
Air is let through the regulator
-
Inflating a mattress
-
Air is blown through a glass tube
-
Air compressor operation
-
Air release with a loud whistling creak,
-
Balloon descent
-
Oxygen balloon
-
Rope torsion
-
Cut through the air with a gas burner
-
Soccer ball
-
Helium balloon
★★★★★