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发明名称
Improvements in or relating to leads for pencils
摘要
申请公布号
GB900964(A)
申请公布日期
1962.07.11
申请号
GB19580028017
申请日期
1958.09.01
申请人
ERIC SCHWANHAUSSER;GUSTAV SCHWANHAUSSER
发明人
分类号
C09D13/00
主分类号
C09D13/00
代理机构
代理人
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地址
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