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当前学科:初级加氢裂化装置操作工
题目:
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在气密过程中,对于精馏塔塔顶的人孔法兰()。
A . 可以不进行气密检查
B . 应进行气密检查
C . 视实际情况决定是否进行气密检查
D . 可以从邻近设备上进行远处观察
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