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单选题
将溢流阀门拨动开关保持在打开位置，直到流出阀位置指示器显示完全打开。
A
A.Hoist the outflow valve toggle switch in the OPEN position until the outflow valve position indicator shows FULL OPEN.
B
B.Hoist the outflow valve trigger switch in the OPEN position until the outflow valve position indicator shows FULL OPEN.
C
C.Hold the outflow valve toggle switch in the OPEN position until the outflow valve position indicator shows FULL OPEN.
答案解析
正确答案：C
相关知识点：
保持溢流阀门开关在打开位置
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