问题
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船舶液压装置中使用比例方向阀较多的是________。A.舵机B.锚机C.绞缆机D.起货机
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三螺杆泵在船上一般不用作________。A.主机滑油泵B.舵机液压泵C.主机燃油泵D.污油泵
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接触器一般由_____装置、传动装置、灭弧装置和安装固定装置组成。
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以动力操纵的应急操舵装置,应在______设有独立的控制系统。Ⅰ、驾驶室; Ⅱ、舵机室; Ⅲ、集控室。A.Ⅰ+ⅡB.
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干式报警阀组安装时 低气压预报警装置应安装在________ 一侧。A.配水支管 B.配水干管 C
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干式报警阀组安装时 低气压预报警装置应安装在________ 一侧。A.配水支管B.配水干管###S
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