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发明名称
LETDOWN VALVE
摘要
申请公布号
ZA8209319(B)
申请公布日期
1983.09.28
申请号
ZA19820009319
申请日期
1982.12.20
申请人
VAAL REEFS EXPLORATION;MINING CO LTD
发明人
DYK BURCKARD BARNEY VAN;PIETERSE HERMANUS JOHANNES HENDRICUS
分类号
F16K
主分类号
F16K
代理机构
代理人
主权项
地址
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