Probably never. Valve can't count to three.
Valve doesn't count to 3.
Bicuspid valve.. a birth defect of the aortic valve.
bicuspid valve tricuspid valve semi lunar valve
The Only Three Questions That Count was created in 2006.
The tricuspid valve or also called the right atrioventricular valve.
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the tricuspid valve
Three. Inlet valve, fuel injection valve, exhaust valve.
A trombone has no valve- only a slide. A valve trombone, or a marching trombone, though, have three valves.
The right AV Valve also known as tricuspid valve
The mitral valve. (The tricuspid valve has three leaflets.)