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经营范围
发明名称
BURNING BAR
摘要
申请公布号
US3487791(A)
申请公布日期
1970.01.06
申请号
USD3487791
申请日期
1968.02.21
申请人
CRESCENT MACHINE & NIPPLE CO.
发明人
HARRY A. DALM
分类号
E21B7/14;(IPC1-7):F23B7/00;F23D21/00
主分类号
E21B7/14
代理机构
代理人
主权项
地址
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