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经营范围
发明名称
Silencieux pour marteaux piqueurs et perforateurs pneumatiques
摘要
申请公布号
FR796067(A)
申请公布日期
1936.03.28
申请号
FRD796067
申请日期
1935.10.09
申请人
发明人
NEWTON CHARLES MILLS;DERMER HAROLD WHITELOCK;MASON JAMES
分类号
E21B1/30
主分类号
E21B1/30
代理机构
代理人
主权项
地址
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