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发明名称
Venting means for pneumatic drills
摘要
申请公布号
US1779245(A)
申请公布日期
1930.10.21
申请号
US19270184564
申请日期
1927.04.18
申请人
INDEPENDENT PNEUMATIC TOOL COMPANY
发明人
NORLING REINHOLD A.
分类号
B23B47/12;E21B3/02
主分类号
B23B47/12
代理机构
代理人
主权项
地址
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