The room is surrounded by steel-reinforced concrete and rubber padding.

房间周围有钢筋混凝土和橡胶垫。

Narrator: These rehearsals also identified where they should add rubber padding to the poles, bus floors, and chairs, which was useful here, when this fighter collapses into a seat.

旁白：这些排练还确定了他们应该在杆子、公共汽车地板和椅子上添加橡胶垫的位置， 这在这里很有用， 当这个战斗机倒在座位上时。