赛象科技：公司全资子公司天津赛象航空装备有限责任公司的主营业务包括专用设备制造等

Group 1 - The core business of the company's wholly-owned subsidiary, Tianjin Saixiang Aviation Equipment Co., Ltd., includes specialized equipment manufacturing, sales of aviation transport equipment, mechanical parts processing and sales, technical services, and import and export of goods [2]