For a long time, the hydro-generator has usually used air as medium to cool its stator, rotor winding and iron core.

长期以来水轮发电机多用空气为介质对其定子、转子绕组以及铁芯进行冷却。

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A kind of plate ventilation heat exchanger was developed and the performance of the heat exchanger was investigated by experiment with air as medium.

本文提出了一种自行加工设计的用于空调余热回收的通风换热器，并对该换热器的性能进行了实验研究。

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Vortex tubes of different length were developed and the effect of the length on the performance of vortex tube was investigated by experiment with air as medium.

研制了不同热端管长度的涡流管，并以空气作为工作介质，通过实验研究了热端管长度对涡流管能量分离性能的影响。

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The self-guided Russian R-77 medium-range air-to-air missile is almost as good as the U.S. AIM-120 AMRAAM.

CENTERFORSECURITYPOLICY: Center For Security Policy

These include: eight sophisticated diesel submarines, advanced SU-30 fighter aircraft, modern air-to-air and air-to-surface weapons, supersonic anti-ship cruise missiles and as many as 350 short- and medium-range ballistic missiles.

CENTERFORSECURITYPOLICY: Back on the China Front