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发明名称
Centreless universal circular arc ruler
摘要
申请公布号
GB1123340(A)
申请公布日期
1968.08.14
申请号
GB19670001766
申请日期
1967.01.12
申请人
TOSHIO YOSHIOKA
发明人
分类号
B43L13/22
主分类号
B43L13/22
代理机构
代理人
主权项
地址
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Drilling head with cone rock bit