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经营范围
发明名称
Extensible spring balance
摘要
申请公布号
US2702920(A)
申请公布日期
1955.03.01
申请号
US19500182369
申请日期
1950.08.30
申请人
DE VRIES ABRAHAM;DE VRIES LOUIS
发明人
VRIES ABRAHAM DE;VRIES LOUIS DE
分类号
E06B3/44
主分类号
E06B3/44
代理机构
代理人
主权项
地址
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