亚洲aⅴ无码专区在线观看_精品福利网站_午夜影院c绿象_中文字幕十区_久久综合日本_久久网站免费视频

August 30, 2010, China Railway No.5 Engineering Group Co., Ltd. came to Aigre for pre-acceptance of welding machine. After a series of test such as inspection of welder appearance, inspection of control procedures, rail grinding after welding and etc., the welder has met the use requirements. The welder will  then sent to Tianjin project department.