西安奕材:关于对外投资暨关联交易的进展公告公告日期:2026/06/24 · 栏目:关联交易 · 代码:688783公告链接:http://static.sse.com.cn/disclosure/listedinfo/announcement/c/new/2026-06-24/688783_20260624_Y2WN.pdf