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经营范围
发明名称
Automatic concrete spreader
摘要
申请公布号
US3255681(A)
申请公布日期
1966.06.14
申请号
US19620229343
申请日期
1962.10.09
申请人
THE HELTZEL STEEL FORM & IRON CO.
发明人
HELTZEL CARL J.;BRUGLER RICHARD K.
分类号
E01C19/18
主分类号
E01C19/18
代理机构
代理人
主权项
地址
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