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经营范围
发明名称
Improvements in or relating to parallel line spacing devices for drawing purposes
摘要
申请公布号
GB679141(A)
申请公布日期
1952.09.10
申请号
GB19500001483
申请日期
1950.03.12
申请人
STEFAN ZABOROWSKI
发明人
分类号
B43L13/04
主分类号
B43L13/04
代理机构
代理人
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