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发明名称
Bridge guard
摘要
申请公布号
US2531565(A)
申请公布日期
1950.11.28
申请号
US19480031724
申请日期
1948.06.08
申请人
GOTTHOLM CARL G
发明人
GOTTHOLM CARL G.
分类号
B61L1/20
主分类号
B61L1/20
代理机构
代理人
主权项
地址
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