During the intermediaterepair the charging system of No1 blast furnace was modernized and PLC control system replaced relay control.
在1号高炉中修时对上料系统进行了改造,用P LC控制取代继电器控制。
2
West Texas Intermediate, an American benchmark, lagged slightly thanks to diminished demand from refineries under repair.
西德克萨斯州中质油由于需求(炼油厂检修)下降,而位列其后。
3
The method of surfacing welding sealing strip was adopted to repair the deformation of the flange joint surface of the high and intermediate pressure outer casing .