By several decades of exploration and practice, the designer has profound acquaintance with stressing mechanism of choke plug that does not rely on shear force to maintain the balance.
经过几十年的探索和实践，设计人员对封堵堵头的受力机理已有了深刻地认识，堵头并不完全是靠基础面的剪摩作用维持平衡。
The impulse test is a checked insulation test which is need both rich theoretics and stressing practice analysis.
电力变压器雷电冲击试验是一项理论性很强而且十分注重实证分析方法的电力变压器绝缘考核试验。
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