$天然资源开采(NRP)$ 8-K - Current report Filed: 2019-05-02 AccNo: 0001171486-19-000019 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 9.01: Financial Statements and Exhibits 网页链接