过滤机在反洗过程中岗位工要注意（），放酸阀、排污阀、水阀。 ["水泵压力","滤机压力","进酸量","出酸量"]
In a diesel engine, the time taken to heat the fuel particles, turn them into vapor, and bring about combustion is called （） ["injection lag","ignition delay","compression","turbulence lag"]
漏泄电缆需按照《铁路通信漏泄同轴电缆》（TB/T 3201）要求采用无卤、低烟（）漏泄电缆。 ["阻燃","防腐","铠装","防蛀"]
在多系统共享分布链路中，将多路移动信号下行合路输出，接收上行信号分路输出至相应接收机的一种设备称之为（）。 ["电桥","POI","功分器","频段合路器"]
晶体管逆变器通常用（）作变压器铁心材料。 ["铁淦氧","坡莫合金","硅钢片","钡铁氧体"]
渐缩喷嘴和缩放喷嘴的变工况特性有何差别？
