| 摘要 |
Surplus portions of a lubricating oil L in closed casings 100 of compressors 1a, 1b and 1c flow into oil pipes 14a, 14b and 14c, individually. The lubricating oil L having flowed into these oil pipes is supplied to the respective closed casings 100 of the compressors 1a, 1b and 1c through oil pipes 18a, 18b and 18c and refrigerant inlet pipes 12a, 12b and 12c. <IMAGE>
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