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发明名称
PERFORATRICE
摘要
申请公布号
IT1222977(B)
申请公布日期
1990.09.12
申请号
IT19870022395
申请日期
1987.10.23
申请人
TEDESCHI DANTE;GREGORINI GIOVANNI
发明人
TEDESCHI DANTE;GREGORINI GIOVANNI
分类号
E21B3/00;E21B4/00;E21B4/02;E21B7/00;E21B7/02;E21B17/03;E21B19/08;E21B19/086;(IPC1-7):E21B/
主分类号
E21B3/00
代理机构
代理人
主权项
地址
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