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发明名称
Improvements in and relating to the counterbalancing of the walking beams of oil well and like pumps
摘要
申请公布号
GB611886(A)
申请公布日期
1948.11.04
申请号
GB19460014365
申请日期
1946.05.13
申请人
GEORGE BELL;BRITISH OILFIELD EQUIPMENT COMPANY LIMITED
发明人
分类号
F04B47/14
主分类号
F04B47/14
代理机构
代理人
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