| 摘要 |
Pressure regulating reservoirs are positioned in an upper portion of a housing, and pumps are positioned below the pressure regulating reservoirs. More specifically, the pressure regulating reservoirs are positioned in an upper portion of the housing so as to provide installation space in a lower portion of the housing. This installation space is used for positioning the pumps, and as a result it is possible to locate the pumps as far as possible toward the bottom of the housing.
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