... selenite cement 石膏水泥 self closing device 自动关闭装置 self closing fire door 自动关闭防火门 ...
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self-closing device 自动关闭装置
Self-closing Device Hinge 自动铰链
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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。
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The utility model is a safety device, which has the functions of self closing and emergency escape.
它是一种安全设施，具有自闭功能和紧急逃生功能。
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模块上移
模块下移
不移动