When they have increased in resistance to a point at which they supply 30,000 watts, they will be on 100% of the time.A SCR (silicon controlled rectifier) or thyrister can also be used.
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释义
当电阻阻值增大到一个临界值及输出功率为30;000瓦时,这个百分比刚好达到100%25.;也可以用可控硅整流器或者是半导体闸流管。
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