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发明名称
Drawing instrument
摘要
申请公布号
GB2084937(A)
申请公布日期
1982.04.21
申请号
GB19800032682
申请日期
1980.10.09
申请人
HELIX INTERNATIONAL LTD
发明人
分类号
B43L9/24;(IPC1-7):B43L9/24
主分类号
B43L9/24
代理机构
代理人
主权项
地址
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