重大技术改造升级工程 major technological transformation and upgrading initiatives
设备改造升级服务 Rebuilding
水处理厂的改造升级 Upgrading Water Treatment Plants
升级改造 upgrading ; upcycle ; upcycling
飞机升级改造 Aircraft Upgrades
无盘工作站的升级改造 Journal of Gansu Normal Colleges
此外，还有70亿美元将用来改造升级现有的铁路和火车。
Some $7 billion more would be needed to upgrade existing lines and rolling-stock.
文摘：文章介绍了HFC网络改造升级的一些具体要求及步骤。
Abstract: This paper introduces some concrete requirements for and procedures of the transformation and upgrade of HFC network.
同时，随着低碳经济时代的到来，国内外大批水泥生产企业的技术改造升级也已迫在眉睫。
At the same time, with the arrival of the low carbon economy times, it is extremely urgent for the large scale cement production enterprises to technically reform and upgrade.
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