Automatic air-insulation device for preventing backflow of gas containing bacteria and poisonous pollutants.,申请号HK20050101002-传众专利搜索

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发明名称	Automatic air-insulation device for preventing backflow of gas containing bacteria and poisonous pollutants.
摘要
申请公布号	HK1072693(A2)	申请公布日期	2005.09.02
申请号	HK20050101002	申请日期	2005.02.05
申请人	TONG YIU KWOK	发明人	YIU KWOK TONG
分类号	E03C;(IPC1-7):E03C	主分类号	E03C
代理机构		代理人
主权项
地址

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