An experiment set of solar ejector refrigeration system was built, in order to study its performance characteristics and the key influence factors, in which R123 was taken as the refrigerant.
建立了以电加热模拟太阳能辐射的喷射式空调系统实验台，研究了喷射式制冷系统的工作特性和影响因素，以及制冷剂r 123的运行性能。
The familiar structures of loose core and ejector of hydrocylinder in injection mold were introduced. The calculating method of selecting hydrocylinder and the key points in using it were discussed.
介绍了液压油缸在注塑模具中常见的抽芯及顶出结构，并对选取油缸的计算方法和使用要点进行阐述。
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