$普拉格能源(PLUG)$ 8-K - Current report Filed: 2017-04-12 AccNo: 0001104659-17-023000 Size: 313 KBItem 1.01: Entry into a Material Definitive AgreementItem 3.02: Unregistered Sales of Equity SecuritiesItem 9.01: Financial Statements and Exhibits 网页链接