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发明名称
Railway crossing
摘要
申请公布号
GB2099051(A)
申请公布日期
1982.12.01
申请号
GB19820014152
申请日期
1982.05.14
申请人
BOWERS GEOFFREY
发明人
分类号
B23K25/00;C21D9/50;E01B7/12;(IPC1-7):E01B7/10
主分类号
B23K25/00
代理机构
代理人
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