The present invention relates to a positioning system and method for hierarchical, using the information server and the master device connected thereto, from the device, the information server information including location information database to track and alarm modules, the master device includes .....
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The invention provides a concrete paving brick capable of clarifying air produced by using building waste and recycled glass and the manufacturing method thereof. The paving brick comprises an absorption layer and a foundation layer, the absorption layer comprises cement, aggregate, titanium oxide a.....
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For the existing clean ashtray, the cigarette or ash needs to be picked up by hand which can cause some health problems, especially after infectious diseases such as SARS outbreak in Hongkong. The utility model discloses an ashtray used together with small containers. The ashtray is provided with a .....
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