[单项选择题] 内燃机船舶主机换向,从前进三到后退三约需时间为:()
18 查阅
[单项选择题] 内燃机船舶主机换向,从前进三到后退三约需时间为:()
A.60-90s
B.90-120s
C.120-180s
D.180-240s
参考答案:
[单项选择题] 内燃机船舶主机换向,从前进三到后退三约需时间为:()
A.60-90s
B.90-120s
C.120-180s
D.180-240s
参考答案: