English to Portuguese Tech/Engineering Electronics / Elect Eng

É um manual de introdução à refrigeração.
Contexto:
Excessive compression ratio causes a significant difference in
pressure ratio between the suction gas pressure and the
discharge gas pressure, which increases the volumetric
expansion of discharge gas remaining in the CYLINDER TOP CLEARANCE, thus resulting in the reductions in the suction gas
amount and the refrigerating capacity.

Outro paráfrago:
When the gas sucked into the cylinder is compressed and
discharged, the gas remains in the CYLINDER TOP CLEARANCE. Due to this residual gas, the volume of fresh suction gas decreases.