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发明名称
Air-cooled brake rim for rotary draw works
摘要
申请公布号
US1763078(A)
申请公布日期
1930.06.10
申请号
US19270231444
申请日期
1927.11.07
申请人
THE NATIONAL SUPPLY COMPANY
发明人
YOUNGKEN BEN N.
分类号
B66D5/02
主分类号
B66D5/02
代理机构
代理人
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