A valve which uses an electrical force motor to control a small stream of hydraulic fluid. The controlled hydraulic fluid is then used to position a large spool.
MOOG is an astronomical software package. It is an example of Fortran code that performs a variety of spectral line analysis and spectrum synthesis tasks under the assumption of local thermodynamic equilibrium.
Moog is a surname.
Moog is a 2004 film by Hans Fjellestad about electronic instrument pioneer Dr. Robert Moog. The film features scenes of Dr. Moog interacting with various musical artists who view Moog as an influential figure in the history of electronic music.
Scammell Scarab reaction valve
This is a reaction valve, it gives trailer braking effort proportional to the tractor unit.
One pipe is a vacuum supply from the vacuum tank and the other goes to the trailer servo.