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发明名称
Improvements in or relating to propeller pencils
摘要
申请公布号
GB635815(A)
申请公布日期
1950.04.19
申请号
GB19480009093
申请日期
1948.03.31
申请人
GERALD GRANGE ESCOMBE
发明人
分类号
B43K21/08
主分类号
B43K21/08
代理机构
代理人
主权项
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