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经营范围
发明名称
Expansion joint
摘要
申请公布号
US1889498(A)
申请公布日期
1932.11.29
申请号
US19310506510
申请日期
1931.01.05
申请人
ROBERTSON ROBERT R
发明人
ROBERTSON ROBERT R.
分类号
E01C11/12
主分类号
E01C11/12
代理机构
代理人
主权项
地址
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