A、either all the way open or all the way closed
B、normally fully open
C、throttled depending on load
D、controlled by liquefied pressure
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A、either all the way open or all the way closed
B、normally fully open
C、throttled depending on load
D、controlled by liquefied pressure
时间：2021-12-31 23:04 关键词： 船舶辅助机械 水路交通运输技能考试 海船船员考试