【化】 vacuum trap
vacuum; void【化】 vacuum【医】 vacuum
coagulate; congeal; curdle; with fixed attention
gas【医】 aer-; aero-; air; atmo-; physo-; pneuma; pneuma-; pneumato-; pneumo-
petal; piston【医】 flap; valva; valve; valvula; valvulae; valvule