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中文摘要：
系统介绍了20K以下温区斯特林型脉管制冷机的最新研究进展，指出了多级斯特林型脉管制冷机的应用前景与发展趋势。深入分析了多级斯特林型脉管制冷机20K以下温区的主要损失特性，以及其难以达到更低制冷温度和更高制冷效率的内在原因，着重说明进一步提高高频回热器效率、发展高效线性压缩机技术是实现突破的关键。
英文摘要：
The recent research and development of Stirling-type pulse tube cryocooler （ STPTC ） below 20 K were reviewed,the difficulties of STPTC in reaching lower refrigeration temperature and obtaining high- er efficiency below 20 K were given by analyzing its main losses in details. Increasing the efficiency of high frequency regenerator and developing higher efficient linear compressor were suggested as the key solutions.
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