Block tubes before the demolition, it is advisable to release high-voltage static electricity, so a number of more secure.
在拆显像管座之前，最好将高压静电放掉，这样更安全一些。
The utility model provides an ultrasonic fault detection comparing test block for a high-voltage pillar porcelain insulator, consisting of a test block body and arc grooves.
本实用新型提供一种高压支柱瓷绝缘子超声波探伤对比试块。
Therefore, it is an important theoretical focus that how to obtain the enough high block voltage or block gain meanwhile resolves the wastage efficiently in turn-off transient.
因此，如何在得到足够高的阻断电压（或阻断增益）的同时能有效减小关断损耗，成为目前急待研究的一个重要理论问题。
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