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2017-11-10View Original

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参与：奖5财富；回答正确：奖10财富；注：此贴有效时间48小时。单选题：临氢系统进行初始气密阶段(　　)。 A、气密、置换同步进行 B、先气密，后置换，节省氮气 C、先空气试压、再氮气置换、 D、先氮气置换合格，再气密答案 D动动手指参与进来，大家学到知识才是我们最终目的。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。【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

Reply #22017-11-11

D、先氮气置换合格，再气密

Reply #32017-11-11

D、先氮气置换合格，再气密

Reply #42017-11-11

D、先氮气置换合格，再气密

Reply #52017-11-11

D、先氮气置换合格，再气密

Reply #62017-11-12

D、先氮气置换合格，再气密

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