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发明名称
Self-marking plumb bob
摘要
申请公布号
US2795053(A)
申请公布日期
1957.06.11
申请号
US19540468614
申请日期
1954.11.15
申请人
WOHLSTROM ROBERT C
发明人
WOHLSTROM ROBERT C.
分类号
G01C15/10
主分类号
G01C15/10
代理机构
代理人
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