The general failure model and mechanism of circuit break, loose contact, instant break, male insulation, short-circuit, false matching, poor fix and bad seal were discussed.
阐述了断路、接触不良、瞬断、绝缘不良、短路、误配线、固定不良和密封不良等常见失效模式和失效机理。
Widely used in plastics and electrical insulation, PCBs -polychlorinated biphenyls - take decades to break down.
大量使用在塑胶，及电气绝缘体上的多氯联苯，需要几十年才会被分解。
Vacuum break hot has long insulation; the effect of exterior design cabinet and delicate, easy to carry, Wide edge for cleaning.
真空断热具有长时间保温之效果外观设计小巧精致，便于携带；宽大杯口便于清洗。
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