self-closing fire door的意思|示意

自关式防火门 ... 自回位手柄：deadman's handle 自关式防火门：self-closing fire door 自供电系统：self-powered systems ...

自动关闭防火门 自动关闭防火门 automatic closing fire door; self closing fire door; self-closing fire door; selfclosingfiredoor 卫生设备水龙头装置.

自关开防火门 ... 快速自关水密 quick-acting watertight self closing 自关开防火门 self-closing fire door 自关式防火门 self-closing fire door ...