turnkey
adjective [ before noun ] uk/ˈtɜːŋ.kiː/ us/ˈtɝːn.kiː/
（设备）即可使用的；可立刻交钥匙的
(of a piece of equipment) ready to be used immediately by the person who is buying or renting it
More and more manufacturers are offering to tailor-make a turnkey system from their own components. 越来越多的制造商利用自己的部件为客户定制即时可用的系统。