Test method for door fittings of buildings - part 3 : floor concealed door closers , door closers and hinge closers 建筑物门配件的试验方法.第3部分:暗装的关门装置关门装置和铰链关门装置
Handsome durable : duct strong sense of the whole , with the handsome , dark can be installed to maximize the ceiling height , not enough space on the floors is particularly important 美观耐用：风管整体感强，明装美观，暗装可以最大限度提高吊顶高度，对层高不够空间尤其重要。
Shutter windows and doors contents , installed , the chinese dress , secretly installed a variety of installation , you can choose the characteristics of the building the best installation program 卷帘门窗有内装、外装、中装、暗装多种安装方式，您可以根据建筑物的特点选择最佳的安装方案。
Amsterdam police will use bicycles equipped with hidden gps [ global positioning system ] transmitters to bait thieves and track them down in the latest effort to stamp out rampant bike theft ， a police spokesman said recently 荷兰首都阿姆斯特丹的自行车偷盗十分猖獗，警方在新近开展的一次打击行动中将采用暗装gps (全球卫星定位系统)发射机的自行车为诱饵，小偷偷走后可对其跟踪，近日警方发言人宣布了此事。
