磁谷科技:关于控股股东、实际控制人权益变动触及1%刻度的提示性公告公告日期:2026/05/07 · 栏目:权益变动报告书公告链接:http://static.sse.com.cn/disclosure/listedinfo/announcement/c/new/2026-05-07/688448_20260507_BDRJ.pdf