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发明名称
Refuse chute
摘要
申请公布号
US1834171(A)
申请公布日期
1931.12.01
申请号
US19290346884
申请日期
1929.03.14
申请人
SAMUEL OLSON & COMPANY INC.
发明人
OLSON SAMUEL;OLSEN ISAK ANDREW
分类号
E04F17/12
主分类号
E04F17/12
代理机构
代理人
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