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.
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。
Temperature control measures for side wall concrete construction in the sixth lock head of the permanent navigation locks at the Three Gorges Project during hot season are briefly given in the paper.
简述了三峡工程永久船闸六闸首边墙混凝土高温季节施工的温控措施。
Temperature control measures for side wall concrete construction in the sixth lock head of the permanent navigation locks at the Three Gorges Project during hot season are briefly given in the paper.
简述了三峡工程永久船闸六闸首边墙混凝土高温季节施工的温控措施。
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