water flow detector meaning in English

水流探测器

Fixed firefighting systems - components for sprinkler and water spray systems - water flow detectors
固定消防系统.喷水器和喷水系统用元部件.水流量测定器
Fixed firefighting systems - components for sprinkler and water spray systems - part 5 : water flow detectors
固定式消防系统.洒水器和喷水系统元件.第5部分:水流量测定器
Fixed firefighting systems - components for sprinkler and water spray systems - part 5 : water flow detectors ; german version en 12259 - 5 : 2002
固定式消防系统.喷头和喷水系统用部件.第5部分:水流