Indoor pollution rapidly damages paper and is a growing problem in energy-conscious Spaces with good insulation.
室内污染会很快损害纸张，这在有着较好绝缘作用的节能空间里日益成为一个问题。
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In the field of mobile communication, demand for location-based service (LBS) is growing, WLAN-based indoor location system that precisely meets the needs is becoming a research focus.