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发明名称
Method of treating mounted glass disc to resist breakage
摘要
申请公布号
US2730840(A)
申请公布日期
1956.01.17
申请号
US19490118308
申请日期
1949.09.28
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
CRAIG FRANK S.
分类号
B61L5/18
主分类号
B61L5/18
代理机构
代理人
主权项
地址
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