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经营范围
发明名称
Expansion arbor
摘要
申请公布号
US2777701(A)
申请公布日期
1957.01.15
申请号
US19530330283
申请日期
1953.01.08
申请人
N. A. WOODWORTH COMPANY
发明人
HOHWART GEORGE;HOHWART ERNEST F.
分类号
B23B31/02;B23B31/40
主分类号
B23B31/02
代理机构
代理人
主权项
地址
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