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经营范围
发明名称
Flotation apparatus
摘要
申请公布号
US1798452(A)
申请公布日期
1931.03.31
申请号
US19270186059
申请日期
1927.04.23
申请人
发明人
BUTCHART WILLIAM A.
分类号
B03D1/16
主分类号
B03D1/16
代理机构
代理人
主权项
地址
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