As described above, collective contracts not only set forth the lowest wage and wage levels for different categories of workers, but also regulate the increase of the base wage by seniority, working conditions and individual performance.
如上所述，集体合同不仅规定了最低工资和不同种类工人的工资水平，还对按年资增加基本工资、工作条件和个人工作表现作了规定。