30% 25% 20% 15% 10% 5% 0% -5% -10% -15% -20% -25% 23-01 23-02 23-03 23-04 23-05 23-06 工程机械指数 23-07 23-08 23-09 23-10 23-11 23-12 24-01 24-02 24-03 沪深300 24-04 24-05 24-06 24-07 24-08 24-09 24-10 投资评级