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发明名称
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摘要
申请公布号
US2184046(A)
申请公布日期
1939.12.19
申请号
US19370177138
申请日期
1937.11.29
申请人
KARINSHAK JR JOHN
发明人
JR. JOHN KARINSHAK,
分类号
E01H8/00
主分类号
E01H8/00
代理机构
代理人
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