$离子地球物理(IO)$ 8-K - Current report Filed: 2019-06-04 AccNo: 0001104659-19-033858 Size: 96 KBItem 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain OfficersItem 9.01: Financial Statements and Exhibits 网页链接