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参与：奖3~5财富；回答正确：奖10财富；注：此贴有效时间48小时。单选题：向高温离心泵的机械密封的密封端面低压侧输入冷却水，主要用于(　　)。 A、冷却机械密封温度 B、将介质与空气隔绝 C、灭火 D、保持机械密封温度答案： A 您的参与，就是对我们工作的最大的支持。送人玫瑰，手留余香。https://bbs.hcbbs.com/static/image/hrline/1.gif https://bbs.hcbbs.com/static/image/hrline/2.gif 注：两天后答案自动公布。 “我的装置我的家“ 大型原创照片分享活动（第二期） https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1868167&extra=page%3D1 【一问一答】催化焦化重整油品调和版2017年汇总贴 https://bbs.hcbbs.com/thread-1826018-1-1.html 【每日一题】催化焦化重整油品调和版2017年汇总贴 https://bbs.hcbbs.com/thread-1811219-1-1.html

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