在检查电路时，应重点检查电线的绝缘层是否发生软化、老化、裂损。
In a circuit, check key check whether the insulation wiring occurs, aging, soften crack damage.
阐明高温功率老化输出检测的重要性，介绍“数字电路巡回检测仪”的工作原理。
The importance of high temperature power aging test and the operation principle of the digital circuit patrol checkout instrument is presented.
不仅开关，连那些老化了电路都已经更换了。
Not only the switches but also the old wiring has been changed.
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