$美国铁塔(AMT)$ 8-K - Current report Filed: 2018-03-29 AccNo: 0001053507-18-000014 Size: 54 KBItem 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 Registrant 网页链接