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经营范围
发明名称
COMPLAINT TOWER
摘要
申请公布号
GB8520742(D0)
申请公布日期
1985.09.25
申请号
GB19850020742
申请日期
1985.08.19
申请人
PMB SYSTEMS ENG LTD
发明人
分类号
E21B17/00
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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