oil spacer
... 油垢形成：oil sludge formation 油隔离液：oil spacer 油膏;软膏;药膏：ointment ...
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用活塞压力计校验氧压力表时，必需采用隔离罐，用水做隔离液将活塞压力计的油隔离，使水进入氧气表中。
With piston oxygen pressure gauge, pressure gauge calibration must adopt isolation tank and water will do spacer piston pressure gauge of oil isolation, make water into oxygen table.
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