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发明名称
Ballast tamper
摘要
申请公布号
US2038220(A)
申请公布日期
1936.04.21
申请号
US19330651940
申请日期
1933.01.16
申请人
CORWILL JACKSON
发明人
JACKSON CORWILL
分类号
E01B27/14
主分类号
E01B27/14
代理机构
代理人
主权项
地址
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