$哈斯科材料(HSC)$ 8-K - Current report Filed: 2018-03-08 AccNo: 0000045876-18-000050 Size: 222 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 Exhib 网页链接