| 摘要 |
PROBLEM TO BE SOLVED: To prevent degradation of the refrigeration capacity by preventing performance degradation caused by long-term wear of a displacer. SOLUTION: The displacer comprises a column 50 of poor heat conductivity provided at a center portion of the displacer 26, a plurality of wire nets 52 laminated through the column 50, and lids 54 and 56 to hold the wire nets 52 from both end portions of the column 50. COPYRIGHT: (C)2004,JPO&NCIPI
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