The next step was the installation of a master firing key in series with the firing circuits of all the guns.

下一步就是装设一个串联到所有火炮发射线路的总按钮。

youdao

The next step was the installation of a master firing key in series with the firing circuits of all the guns.

下一步就是装设一个串联到所有火炮发射线路的总按钮。

youdao