二套电机泵组，互为备用，可实现液压联锁和电气联锁。
Two motor pumps are spare to each other, realizing hydraulic interlock and electrical interlock.
每个闸首的2个子站互为备用，且同时投入运行，运行时只有一个子站的控制信号输出。
For every lock head, each of its 2 substations is a reserve one to the other, but these two substations operate concurrently and only one substation has control signal output.
将两条生产线氢气管道进行联网改造，达到两条生产线氨分解制氢装置互为备用，增加系统供气可靠性的目的。
Hydrogen pipes for two production lines were interconnected so as to share the hydrogen-generating devices with ammonia decomposition technology and insure protect gas supply for the two lines.
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