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经营范围
发明名称
KOBLINGSSPERRE.
摘要
申请公布号
NO864032(D0)
申请公布日期
1986.10.10
申请号
NO19860004032
申请日期
1986.10.10
申请人
NOVACORP INTERNATIONAL CONSULTING LTD
发明人
YIP, DAVID;GIBB, PETER R.
分类号
E21B33/038;F16L37/12;F16L37/56;(IPC1-7):E21B/
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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