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发明名称
Improvements in propeller pencils
摘要
申请公布号
GB525509(A)
申请公布日期
1940.08.29
申请号
GB19390005972
申请日期
1939.02.23
申请人
EDWARD BAKER & SON, LIMITED;ALWYN PERRY
发明人
分类号
B43K21/12
主分类号
B43K21/12
代理机构
代理人
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