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发明名称
Wheel positioning device for toy trains
摘要
申请公布号
US2503890(A)
申请公布日期
1950.04.11
申请号
US19480008084
申请日期
1948.02.13
申请人
STUDER JULIAN L
发明人
STUDER JULIAN L.
分类号
A63H19/22
主分类号
A63H19/22
代理机构
代理人
主权项
地址
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