Terms containing lowering of pressure

Subject	English	Italian
el.	inward leakage of air the external glands are either to prevent the leakage of steam which is at a higher pressure than the atmosphere,or to prevent the in-leakage of air when the pressure of the steam in the turbine casing is lower than atmosphere.The gland at the low-pressure or exhaust end of the turbine has to seal the casing against the in-leakage of air	Infiltrazione d'aria all'interno
mech.eng.	lowering of pressure	abbassamento di pressione