air relief cock /cơ khí & công trình/
van giảm áp
air bleeder, air cock, air relief cock, air-blast vent, air-bleed vent, air-relief valve, bleed valve
van xả khí
air relief cock, compression release valve, decomposition value, delivery valve, depressurization valve, high-pressure relief valve, overpressure release valve, pet cock, pressure limiting valve, pressure reducer, pressure reducing valve, pressure relief valve
van giảm áp