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发明名称
PERCUSSIVE PNEUMATIC APPARATUS
摘要
申请公布号
GB8611289(D0)
申请公布日期
1986.06.18
申请号
GB19860011289
申请日期
1986.05.09
申请人
FULLER, J D;ROBBINS, B A
发明人
分类号
E21B4/14;F16L55/165
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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