在马丁代克仪表的键盘上可以看到，一排排的信号灯总是在迅速地忽明忽暗。

On the keyboard of Martin-decker, rows of signal lights can be seen switching on and off rapidly all the time.

youdao

在马丁代克仪表的键盘上可以看到，一排排的信号灯总是在迅速地忽明忽暗。

On the keyboard of Martin-decker, rows of signal lights can be seen switching on and off rapidly all the time.

youdao