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发明名称
Self-adjusting roller
摘要
申请公布号
US1794696(A)
申请公布日期
1931.03.03
申请号
US19300430251
申请日期
1930.02.21
申请人
LE TOURNEAU ROBERT G
发明人
TOURNEAU ROBERT G. LE
分类号
E01C19/25
主分类号
E01C19/25
代理机构
代理人
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地址
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