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选择题 离心泵机械密封漏损轻质油不大于11滴/分，重质油不大于_____滴/分 。 （ （）3 （ （）4 （3） （ 答: （4）
离心泵机械密封漏损轻质油不大于 （11滴/分，重质油不大于__（3）5___滴/分 。"]