微波等离子推力器(mpt)谐振腔只有在谐振状态下，微波能量才能被高效地用于加热工质产生推力。
Only when the resonant cavity of microwave Plasma Thruster (MPT) is under the resonant state, the microwave energy can heat propellant gas to produce thrust efficiently.
制定加热器方案要解决的主要问题是使各加热管内的工质流量均匀，温度分布均匀。
The main problems of heater design have uniformity of mass-flow-distribution, uniformity of temperature and machining craft.
试验换热管为垂直套管式，外层为加热水路，内层为工质回路，中心布置着电极。
The test section was a vertical tube-in-tube heat exchanger with hot water in the annulus and the test refrigerant in the inner tube.
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