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当前学科:中级聚酯装置生产操作工
题目:
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停止预聚物输送泵时,应将泵速降至10%,然后()。
A . A、在自动控制下停止
B . B、在串级控制下停止
C . C、在手动控制下停止
D . D、只要停止就行
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