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经营范围
发明名称
Ventileinsatz
摘要
申请公布号
AT290317(B)
申请公布日期
1971.05.25
申请号
AT19690003662
申请日期
1969.04.16
申请人
VENTREX ING. R. ADAM VENTIL-METALLWARENERZEUGUNG KOMMANDITGESELLSCHAFT
发明人
分类号
E21B43/18;F16K15/20;(IPC1-7):F16K15/20
主分类号
E21B43/18
代理机构
代理人
主权项
地址
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