self closing device

基本解释

Door shall become self-closing on interruption of signal to release device.
儅釋放裝置信號中斷時自動關閉。
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Doors of engine casing and stair casing on main deck are of fire doors with self-closing device.
主甲板機艙棚圍壁和梯道環圍等処安裝的門爲帶閉門器的防火門。
When the partition is running, the wicket is always at closing state for the guarantee of self-lock device. So, there will be no accident when the wicket is suddenly opened.
屏風在運行中，有自鎖裝置的保護，小門始終処在關閉狀態，這樣就不會因小門扇的突然張開而帶來意外。