接线展开图由交流电压回路、直流操作回路和信号回路三部分组成。
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冷却水泵出现故障,导致冷却水水流不足或中断会导致冷凝压力超高
A. 正确
B. 错误
为形成晶粒细小,成分均匀的奥氏体,应合理选定钢的()和()。
In relation to the turning circle of a ship , the term transfer means the distance().
A. gained in the direction of the original course
B. gained at right angles to the original course
C. the ship moves sidewise from the original course awayfrom the transfer means the distance
D. around the circumference of the turning circle
安装液气大钳时用钢丝绳套将()千牛的滑轮固定在天车的大梁上。
A. 20
B. 30
C. 50
D. 100