Several distributor transformers had fallen from the poles, and secondary wires and service drops were down.几个配电变压器从电线杆上摔下来, 副线及吊饰也垂下来.Our opinions on this subject are at opposite poles.我们对这一问题的看法截然相反。For six months of t...
手动密闭闸阀主要由把手 、 阀体 、 插板 、 锁紧螺钉、密封装置等部件组成.The valve is mainly made up of handle, body, disc, locknut and seal etc.通过多个插头围绕着插板的画面, 含蓄来说明 自尊 自爱的这一主题.Is revolving flapper's picture through many plugs, contains explains th...