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发明名称
Railway truck spring
摘要
申请公布号
US1974135(A)
申请公布日期
1934.09.18
申请号
US19310573470
申请日期
1931.11.06
申请人
T. H. SYMINGTON & SON., INC.
发明人
DRENNING PERCY R.
分类号
B61F5/06
主分类号
B61F5/06
代理机构
代理人
主权项
地址
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