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经营范围
发明名称
RINGFOERMIGE ABSPERRVORRICHTUNG
摘要
申请公布号
AT385085(B)
申请公布日期
1988.02.10
申请号
AT19830003226
申请日期
1983.09.09
申请人
CAMERON IRON WORKS, INC.
发明人
分类号
E21B33/06;(IPC1-7):E21B33/12
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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