节能环境：公司电工装备板块处于业务链的上游环节，主要客户是变压器制造企业

Group 1 - The core viewpoint of the article is that the company, Energy Saving Environment, has provided insights into its electrical equipment segment, indicating its position in the upstream of the business chain [2] - The main customers of the electrical equipment segment are transformer manufacturing companies, but the company does not have specific information regarding their participation in the "West-East Power Transmission" project [2] - For further details on the electrical equipment business, the company refers investors to its disclosed periodic reports and temporary announcements [2]