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发明名称
Improved switch blade device for railway points
摘要
申请公布号
GB472517(A)
申请公布日期
1937.09.24
申请号
GB19370000596
申请日期
1937.01.08
申请人
BOCHUMER VEREIN FUER GUSS STAHLFABRIKATION AKTIENGESELLSCHAFT
发明人
分类号
E01B7/02
主分类号
E01B7/02
代理机构
代理人
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