price fixing
noun [ U ] business, finance & economics specialized uk/ˈpraɪs ˌfɪk.sɪŋ/ us/ˈpraɪs ˌfɪk.sɪŋ/
不同公司之间（非法）制定统一价格以求保持高价
an agreement that is usually not legal, in which companies all sell goods at a particular price in order to keep prices high