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发明名称
IMPROVEMENTS IN PNEUMATIC PERCUSSION HAMMERS
摘要
申请公布号
GB2240569(B)
申请公布日期
1992.08.05
申请号
GB19910005739
申请日期
1991.03.19
申请人
WILLIAM * LISTER
发明人
WILLIAM * LISTER
分类号
E21B4/14;E21B21/10;E21B21/12;(IPC1-7):E21B4/14
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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