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第四届全国低温工程学术会议将于今年７月在上海召开。这次会议将总结、交流我国低温工程领域近几年取得的最新成果和最新进展，并对今后的发展方向进行深入的研究与探讨，面对２１世纪的挑战提出相应的对策。会议论文内容十分丰富，涉及面非常广泛，其中包括小型制冷机的研制
The Fourth National Low Temperature Engineering Conference will be held in Shanghai in July this year. This meeting will summarize and exchange the latest achievements and latest progress made in the field of cryogenic engineering in our country in recent years and conduct in-depth research and discussion on the future development direction and put forward corresponding countermeasures in the face of the challenges of the 21st century. Conference papers are very rich, covering a very wide range, including the development of small refrigerators