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经营范围
发明名称
Air valve
摘要
申请公布号
US2162671(A)
申请公布日期
1939.06.13
申请号
US19370125611
申请日期
1937.02.13
申请人
JOHN B. PIERCE FOUNDATION
发明人
GROENIGER WILLIAM C.
分类号
E03C1/10
主分类号
E03C1/10
代理机构
代理人
主权项
地址
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