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发明名称
TRYKKLADET SIKKERHETSVENTIL.
摘要
申请公布号
NO850861(A)
申请公布日期
1985.11.22
申请号
NO19850000861
申请日期
1985.03.04
申请人
CAMCO, INCORPORATED,
发明人
PRINGLE, RONALD EARL,
分类号
E21B34/00;E21B34/10;(IPC1-7):E21B/
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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