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发明名称
RELEASE COUPLING
摘要
申请公布号
AU1837988(A)
申请公布日期
1989.01.05
申请号
AU19880018379
申请日期
1988.06.24
申请人
DESMOND EDWARD BESWICK
发明人
DESMOND EDWARD BESWICK
分类号
E21B;E21B17/06;E21B31/00;F16B21/00
主分类号
E21B
代理机构
代理人
主权项
地址
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