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经营范围
发明名称
Gas meter prover apparatus
摘要
申请公布号
US2555771(A)
申请公布日期
1951.06.05
申请号
US19480048851
申请日期
1948.09.11
申请人
ELECTRONIC TESTER OF GAS METERS, INC.
发明人
WATSON PHILIP R.
分类号
G01F25/00
主分类号
G01F25/00
代理机构
代理人
主权项
地址
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