当有人非法接近门或窗时，它能立即发出报警声警告入侵者离开及提醒主人。
When someone close to doors or Windows illegal, it can immediately send warning voice warning intruders left and remind owners.
最近我看到楼下或相邻的浴室之间滑动门有很大的间隙，或者在两个浴室之间开着有灯的百叶窗，还有传过来的声音。
Recently I've seen sliding bathroom doors with big gaps below and on either side, Windows in showers, and louvered walls that let in light, and along with it sounds.
联大是一家专业生产管状电机的制造企业，其产品广泛用于家用或商用的卷帘门，遮阳蓬，车库门，防火门，百叶窗和投影幕等设施。
LianDa is a Company specializing in tubular motors for shutters, awnings, garage doors, fire shutters, blinds and screens userd in home and buildings.
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