主甲板机舱棚围壁和梯道环围等处安装的门为带闭门器的防火门。

Doors of engine casing and stair casing on main deck are of fire doors with self-closing device.

youdao

主甲板机舱棚围壁和梯道环围等处安装的门为带闭门器的防火门。

Doors of engine casing and stair casing on main deck are of fire doors with self-closing device.

youdao