正确答案: A
must be provided
题目:In order to ensure the safety of the ship and its equipment during UMS operation, certain essential functions ().
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学习资料的答案和解析:
[单选题]舵杆工作轴颈与舵叶轴承孔同轴度检验前,先将舵杆与舵叶组装在一起,并使()。
舵杆与舵叶法兰结合面贴紧和法兰连接螺栓中至少有4个紧配螺栓
[单选题]To minimize corrosion, fuel oil strainer disks, spacers and scraper blades are made of ().
monel metal or stainless steel