正确答案: B
6
题目:对每台不能换向的发动机在冷机条件下连续起动次数应不少于()次。
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学习资料的答案和解析:
[单选题]航行中在舵机工作正常的情况下,舵沉重的原因可能是()。
舵承损坏
[单选题]The bore of each cylinder is formed in a liner which can be () when worn out.
replaced
[单选题]Excessive vibration of an automatically fired auxiliary boiler can be caused by ()
combustion pulses