第二阶段的建设现在已经开始了，它主要是为了给维京银河的先期飞行做准备。
Construction of phase two has already begun and is set for completion in time for Virgin Galactic's pioneering flights.
介绍了南水北调中线京石段应急供水工程各类闸站负荷等级、主接线方式、供电保证概率分析计算等。
The relationship between water supply assurance factor and the quantity of sanitary fittings operated simultaneously which is used to determine the design flow rate is analyzed.
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