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经营范围
发明名称
WATERTIGHT SHAFT LINING
摘要
申请公布号
PL120333(B1)
申请公布日期
1982.02.27
申请号
PL19790213308
申请日期
1979.02.09
申请人
发明人
分类号
E21D;E21D5/012;(IPC1-7):E21D5/01
主分类号
E21D
代理机构
代理人
主权项
地址
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