以下为句子列表：
英文: Fire Protection System Installations: The National Fire Protection Agency (NFPA) Guidelines require a confirming flow test be conducted by a certified tester whenever a main linevalve is installed, such as a shut-off valve or a backflow preventer.
中文: 消防系统安装：美国全国消防局（NFPA）指导方针要求在安装“主管道”阀门时要由有资格证书的检验员对关闭阀或防回流阀进行流量检测。
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英文: Fire Protection System Installations: The National Fire protection Agency (NFPA) Guidelines require a confirming flow test be conducted whenever a main linevalve such as the shutoff valves or a backflow assembly have been operated.
中文: 消防系统安装：美国国家消防局（NFPA）指导原则要求只要是“主管线”上已经运行的阀门，如关闭阀或防回流阀总成，都需要进行流量确认检测。
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英文: The National Fire Protection Agency (NFPA) Guidelines require a confirming flow test to be conducted whenever a main linevalve such as the shutoff valves or a backflow assembly have been operated.
中文: 美国国家防火协会（NFPA）指导原则要求对于主管线上运行的阀门，如关闭阀或防回流阀总成，必须进行流量测试。
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英文: Methods According to Schafer’s BOO grade and A G values measured during the first pressure flow test from two sequential studies in 7 cases of BPH, all cases were divided into three groups: Group (BOO Ⅱ grade),9;
中文: 方法采用连续两次压力－流率法检测7例BPH伴BOO者。 将在第次压力－流率测定中得A－G值，按照Schafer氏BOO分级把病人分成 组：第组为BOO级9例；
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