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经营范围
发明名称
Improvements in or relating to rules
摘要
申请公布号
GB512680(A)
申请公布日期
1939.09.22
申请号
GB19380007114
申请日期
1938.03.07
申请人
WALTER RONALD PRESTON
发明人
分类号
G01B3/08
主分类号
G01B3/08
代理机构
代理人
主权项
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