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发明名称
Transportation systems
摘要
申请公布号
US2751853(A)
申请公布日期
1956.06.26
申请号
US19500199102
申请日期
1950.12.04
申请人
TEMPLETON JOHN B
发明人
TEMPLETON JOHN B.
分类号
E01D21/00
主分类号
E01D21/00
代理机构
代理人
主权项
地址
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