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发明名称
CLEAN OUT APPARATUS FOR DRILL STEEL
摘要
申请公布号
CA448618(A)
申请公布日期
1948.05.18
申请号
CAD448618
申请日期
申请人
MYRTIE DOHN;AUGUST R. KURTZ;AUGUST R. KURTZ;NELSON J. AABOE;MYRTIE DOHN
发明人
FLOYD S. BROWN;CLARENCE J. BROWN
分类号
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