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发明名称
Gas main stopper
摘要
申请公布号
US1960710(A)
申请公布日期
1934.05.29
申请号
US19330681451
申请日期
1933.07.21
申请人
SAFETY GAS MAIN STOPPER CO., INC.
发明人
PEDEN HUGH L.
分类号
F16L55/124
主分类号
F16L55/124
代理机构
代理人
主权项
地址
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