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转门是在外力作用下可进行旋转的门。据记载,原始转门最初出现在19世纪末,迄今已有近百年的历史。20世纪30年代,人力推动的转门开始在国外一些大型建筑物上采用。近20年来,国外转门无论在尺度、构造、材料选用以及一些细部作法上均有较大改进。随着高新技术的发展和应用,出现了性能日趋完善的自动转
Turning door is a door that can be rotated under the action of external force. According to records, the original turnaround first appeared in the late 19th century, so far nearly a hundred years of history. In the 1930s, manpower-driven turnarounds began to be adopted in some large foreign buildings. In the past two decades, there has been a great improvement in the scale, structure, material selection and some detailed practices of the turnstiles abroad. With the development and application of high technology, there has been an automatic turnaround of increasingly perfect performance