(valve) control consisting of a mechanical device for controlling the flow of a fluid
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
(valve) a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
(valve) device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
SMCS, the Submarine Command System, was first created for the Royal Navy of the United Kingdom's Vanguard class submarines as a tactical information system and a torpedo weapon control system. Versions have now also been installed on other submarine classes.
(SMCS) Short Message Service Centre. A network switch for routing SMS traffic.
SMC Swiss Management Center AG, a Swiss Corporation, registered at Baarerstrasse 112, CH-6302 Zug, Switzerland.
The lesser blue headed gate valve in its natural habitat
A wild brass gate valve is very rarely seen in its natural environment, so I felt honoured indeed to spot this one before it saw me.