| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly efficient compressor of a little sliding loss between a piston and a cylinder. SOLUTION: A cylinder block 220 and the piston 223 are formed out of an aluminum material, and an iron coating layer 224 is formed on one of sliding surfaces of the piston 223 and the cylinder 221. The piston 223 and the cylinder 221 slide under a condition of slide of iron material and aluminum material of which friction coefficient and sliding loss are small. Consequently, the efficient compressor can be provided. COPYRIGHT: (C)2008,JPO&INPIT
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