碳精棒常用于电弧灯.The stick of carbon is often used in an electric arc lamp.内阳极有两种材质,分别为不溶性碳精棒和含磷铜棒.The inner anode includes insoluble carbon and phosphorous - copper bar....
一些结构由两件式阀盖和轭架组成.Some designs incorporate a two - piece bonnet and yoke.我们需要存下200英镑以备更换水泵阀。Well we need to put by £200 for the pump valves to be renewed.把PCV阀固定在开启位置即最大流量位置.The PCV valve sticks in the open, maximum - flow...