中密控股：截至目前，公司旋转喷射泵产品的销量与去年同期相比有一定增长

Group 1 - The core viewpoint of the article indicates that the sales of rotary jet pumps have shown a certain increase compared to the same period last year [2] - The company, Zhongmi Holdings (300470.SZ), confirmed the growth in sales of its rotary jet pump products as of December 21 [2] - The information was shared in response to an inquiry from investors on an interactive platform [2]