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发明名称
Poraava laite ja sen etenemisen säätömenetelmä
摘要
申请公布号
FI911415(A)
申请公布日期
1992.09.26
申请号
FI19910001415
申请日期
1991.03.25
申请人
ILOMAEKI, VALTO
发明人
ILOMAEKI, VALTO
分类号
E21B44/02;E21B4/16;E21B44/00
主分类号
E21B44/02
代理机构
代理人
主权项
地址
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