After passing through the expansion valve the refrigerant should be in the state of _____.

In a （) boiler the water flows through the inside of the tubes while the hotgases pass ro

In motor－ships, _____, after passing through main and motion bearings and oil cooled pisto

For a generator engine, after passing through the turbine the exhaust gas may be conducted

The carriage passed through the palace gate.（英译中)

As the refrigerant passes through the valve orifice, its pressure is reduced and part of t

When the vocal folds are apart, the air can pass through easily and the sound produced is