三相变压器额定电压为220/110V,Yy12,在高压侧作短路实验测得短路阻抗标幺值为0.0l6,若在低压侧作短路实验,测得短路阻抗标幺值为
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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