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发明名称
WET AND DRY BACKHEAD FOR ROCK DRILLS
摘要
申请公布号
CA485428(A)
申请公布日期
1952.08.05
申请号
CAD485428
申请日期
申请人
CHICAGO PNEUMATIC TOOL COMPANY
发明人
EARL BEAN LEAR
分类号
主分类号
代理机构
代理人
主权项
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