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发明名称
Asphaltum-heater apparatus
摘要
申请公布号
US1751452(A)
申请公布日期
1930.03.18
申请号
US19250029242
申请日期
1925.05.09
申请人
LITTLEFORD BROTHERS
发明人
STRIETMANN HERMAN H.
分类号
E01C19/17
主分类号
E01C19/17
代理机构
代理人
主权项
地址
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