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发明名称
Counterweight
摘要
申请公布号
US1994380(A)
申请公布日期
1935.03.12
申请号
US19270234325
申请日期
1927.11.19
申请人
THE NATIONAL-SUPERIOR COMPANY
发明人
WRIGHT DALLAS E.
分类号
F04B47/14
主分类号
F04B47/14
代理机构
代理人
主权项
地址
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