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从技术情报领域的大量文献资料来看,近年来许多工业发达国家对普冷技术的研究工作很重视。他们针对机械、电器、化工、石油、矿山以及工程机械等工业生产和应用的实际问题,做了大量的试验、研究工作,发表了许多成果和新产品。并对有关基础理论进行了探讨,使普冷低温技术形成一个专门的学科,在工业生产的各个领域发挥着重要作用。日本机械学会的油压工学研究会一九七九年发表的统计资料指出,日本在七十年代针对寒冷气温下液压机械所存在的重大技术问题,提出的研究报告就有137篇;一
From a large amount of literature in the field of technical intelligence, in recent years, many industrialized countries attach great importance to the research of general cold technology. They have done a lot of experiments and research on the actual problems of industrial production and application of machinery, electrical appliances, chemicals, petroleum, mining and engineering machinery, and have published many achievements and new products. And the basic theory was discussed, so that the general cold temperature technology to form a special subject, in all areas of industrial production plays an important role. According to statistics released by Japan Society of Hydraulic Engineering Research Association in 1979, there were 137 research reports submitted by Japan in the 1970s on the major technical problems of hydraulic machinery at cold temperatures; one