通过与R13 - R22和NH3 - NH3复叠式循环的比较，可以看出CO2 - NH3的复叠式制冷循环在低温制冷条件下有明显优势。
By comparing with the R13 - R22 and NH3 - NH3 cascade refrigeration cycles, the obvious advantage of the CO2-NH3 cascade refrigeration cycle, at low temperature is demonstrated.
本文将气波制冷技术与涡旋式气流粉碎机结合，成功地实现了胎面胶粒和其它物料的低温粉碎。
By means of wave machine and vortex mill, it is a successful to grind tired tyre and other materials under the cryogenic environment.
对所有的回热式低温制冷机，压力波与质量流之间的相位控制是达到制冷效果的关键。
To all the regenerative refrigerators, to control the phase angle between the pressure and the volumetric velocity is pivotal to attaining satisfactory refrigeration effect.
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