挖掘机指数盘中拉升，成分股表现活跃

Group 1 - The excavator index experienced a strong surge, with a daily increase of 2.32% [1] - Component stocks showed active performance, with China First Heavy Industries hitting the daily limit [1] - Other companies such as XCMG, Liugong, Shantui, and Zoomlion also saw significant gains [1]