英杰电气：公司主要产品为工业电源，变压器是电源产品的重要部件，此类产品公司多以外采为主

Group 1 - The company has been asked by investors about its solid-state transformer technology reserves [2] - The main products of the company are industrial power supplies, and transformers are important components of these power products [2] - The company primarily sources transformers externally rather than manufacturing them in-house [2]