$美国石绵(USG)$ 8-K - Current report Filed: 2017-05-01 AccNo: 0001193125-17-150440 Size: 1 MBItem 1.01: Entry into a Material Definitive AgreementItem 2.03: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a RegistrantItem 8.01: Other Event 网页链接