采用分析的方法对制冷循环各部件进行了分析，同时比较了混合工质一次节流循环和内复叠循环热力性能。

Extensive comparison is made between the single-stage cycle and a typical auto-cascade cycle using same mixed-refrigerant.

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以抽真空与节流相结合为基础，给出了几种超流氦冷却循环方式；分析了这几种方式的流程机理和冷却特性。

Based on vacuum pumping accompanied with throttling process, presenting several superfluid helium cooling cycles and analyzing their flow principle and cooling characteristic.

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对于强制循环系统，为了避免循环水动力的多值性，设计均要求在每一根水冷壁管设置节流孔板。

For the forced circulation system, to avoid the excessive values of circulation water dynamic, every water cooling tube must be mounted throttle plate in the design.

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