A simple calculation formula of the horizontal bearing capacity is deduced according to the model.
水平承载力公式按照三维空间问题进行推导，形式简单，计算方便，有较强的实用价值。
Simple calculation formula of MCT turning off current is derived.
推导了MCT关断电流的简单计算公式；
Simple calculation formula of MCT turning off current is derived.
推导了MCT关断电流的简单计算公式；
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