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发明名称
Tête de haveuse ou tarière perfectionnée
摘要
申请公布号
FR1114347(A)
申请公布日期
1956.04.11
申请号
FRD1114347
申请日期
1954.08.17
申请人
JOY-SULLIVAN LIMITED
发明人
分类号
E21C25/58
主分类号
E21C25/58
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