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经营范围
发明名称
VENTING DEVICES
摘要
申请公布号
GB8305244(D0)
申请公布日期
1983.03.30
申请号
GB19830005244
申请日期
1983.02.25
申请人
CHAN, SOONG-HOI
发明人
分类号
E03D9/052;(IPC1-7):E03D9/052
主分类号
E03D9/052
代理机构
代理人
主权项
地址
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