... door hold-open device 保持门开启装置 door holding device 门的保持装置 door interlock 门联锁装置 ...
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Instead, they would download an application to their mobile device that would enable them to open their door simply by holding their phone to a sensor.
客人可以下载一个应用程序到他们的手机上，他们只需把手机对准电子探测器，已下载的程序就可以帮助他们轻松地打开客房门锁。
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