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凹凸法兰密封面的标志代号是()。A、FMB、JMC、FFD、G...
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新工厂入厂三级安全教育及时间分别是:厂级教育48小时;车间级教育36小时;班组教育12小时。...
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对理论板的叙述错误的是()。A、板上气液两相呈平衡状态B、实际上不可能存在C、是衡量实际塔板分离效率的一个标准D、比实际塔板数多...
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二段加氢采用高效还原催化剂B,进行深度芳烃饱和,使正己烷和植物油抽提溶剂的()含量满足产品标准要求。...
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离心泵的主要润滑部位是()。A、密封B、轴承C、各接触点...
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