... multi-spout packing machine （固定式）多嘴包装机 multi-stage cooler 多级冷却机 multistorey kiln 多层窑 ...
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multi-stage semiconductor cooler 多级半导体制冷器
The conclusions obtained in this paper can provide some theoretical meanings for the optimal design of multi-stage semiconductor cooler.
本文所得的结果对多级半导体制冷的优化设计具有一定的理论意义。
Use single stage version to reach the temperature of 20 K is a difficulty for high frequency pulse tube cooler (PTC). Multi-stage version is a popular method to reach the low temperature.
单级高频脉冲管制冷机直接降低到20 K以下温区存在很大困难，采用多级方案是高频脉冲管制冷机获得更低温度的主要方法。
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