题目详情A.howeverB.butC.asD.although
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安装阀门定位器的重要作用是可以用于消除执行机构薄膜和弹簧的不稳定性，以及各可动部分的摩擦影响，从而提高调节阀的精确定位和可靠性。( )
某调节阀法兰标准规格为ANSI1500RJ.3，其中，ANSI1500表示的是它的实际工作压力。( )
进入气动调节阀及其附件的操作气源应干燥、清洁、无油。( )
使用手操器可以从现场接线盒、端子板或在控制室这样的安全地区对智能阀门定位器进行远距离组态，调试，诊断，数据管理等。( )
调节阀长期停车后再使用，应仔细检查、清除阀内积液和污杂物。( )
智能阀门定位器，是基于微处理器的具有高精度的阀门位置信号传感器。( )
