A water heater's temperature and pressure relief valve must be piped to the nearest drain in order to avoid damage in the event the valve is actuated. 熱水器的降溫減壓安全閥必須用管道連接到最近的排水口，以避免萬一閥門啟動所造成的破壞。
Check the temperature-pressure relief valve to insure that the valve has not become incrusted with lime. 檢查降溫減壓安全閥是否被石灰堵塞。
Experimental results show that the optic-electric measurement system can meet the requirement of measuring voltage distribution of valve thyristors. 實驗表明本文研製的光電測量系統可以滿足測量換流閥晶閘管電壓分佈的需要。
In this paper, the influence of the aforementioned charge dispersity at valve turn-off on thyristor terminal voltages is illustrated. 首先分析直流換流閥關斷時刻反向恢複電荷差異對晶閘管級端電壓的影響。
