As a rule, when engineer wants to change over the pneumatic manoeuvring system to the mechanical manoeuvring system or vice versa, the engineer must perform the change-over operation with the engine stopped.
As a rule, when engineer wants to change over the pneumatic manoeuvring system to the mechanical manoeuvring system or vice versa, the engineer must perform the change-over operation with the engine stopped.
作为一个惯例，当轮机员要转换气动操纵系统到机械操纵系统或反过来转换机械操纵系统到气动操纵系统，轮机员必须在机器停止时进行转换操作。