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发明名称
Automatic hydraulic elevator valve control
摘要
申请公布号
US2253570(A)
申请公布日期
1941.08.26
申请号
US19370174499
申请日期
1937.11.13
申请人
LOVEJOY VINCENT F
发明人
LOVEJOY VINCENT F.
分类号
B66B1/04;F16K31/40
主分类号
B66B1/04
代理机构
代理人
主权项
地址
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