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Meanings of poppet valve in English

Russian
газораспределительный механизм
Portuguese
árvore de comando das válvulas
Spanish
válvula de asiento
Catalan
vàlvula de seient

Mechanical system that controls operation of the valves in an internal combustion engine.

газораспределительный механизм
Russian
тарельчатый клапан
Spanish
válvula de asiento
Catalan
vàlvula de seient

Valve typically used to control the timing and quantity of gas or vapour flow into an engine.

тарельчатый клапан

A mushroom-shaped valve that rises perpendicularly from its seat; commonly used in internal-combustion engines.

Usage of poppet valve in English
1
The accompanying sketch illustrates a two-cylinder single-acting, poppet valve steam engine of home construction.
The Boy Mechanic, Volume 1: 700 Things for Boys to Do
2
I saw even then that the secret of a well-set poppet valve -short travel -was bound to win out against prejudice.
The Irish Times