The story
Named after the hollow central D-sectioned piston.
Etymology from Wiktionary, CC BY-SA 4.0.
D valve
Today it means: A slide valve with a cup-like cavity in its face, through which exhaust steam passes. Full definition →
Today it means: A slide valve with a cup-like cavity in its face, through which exhaust steam passes. Full definition →
Named after the hollow central D-sectioned piston.
Etymology from Wiktionary, CC BY-SA 4.0.