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经营范围
发明名称
Plumb bob
摘要
申请公布号
US2135211(A)
申请公布日期
1938.11.01
申请号
US19370177657
申请日期
1937.12.02
申请人
IRA J. WILSON
发明人
JOHNSON MARTIN E.
分类号
G01C15/10
主分类号
G01C15/10
代理机构
代理人
主权项
地址
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