$离子地球物理(IO)$ 8-K - Current report Filed: 2019-06-17 AccNo: 0000866609-19-000069 Size: 39 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