论文部分内容阅读
2010年8月12日,北方交通集团最新研制的“∪”型臂汽车起重机QY50U在沈阳下线。QY50U是北方交通自主研发的四桥“∪”型臂汽车起重机,具有完
August 12, 2010, the newly developed North Transport Group “” type arm truck crane QY50U in Shenyang off the assembly line. QY50U is a four-axle “∪ ” type arm truck crane developed independently by Northern Traffic, with complete