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材料 GE-N-FET锗N沟道 相数 单相 导电方式 增强型 快恢复二极管工作原理: 1、快恢复二极管的内部结构是在P型硅材料与N型硅材料中间增加了基区I,构成PIN硅片。因基区很薄,反向恢复电荷很小,不仅大大减小了TRR值,还降低了瞬态正向压降,使管子能承受很高的反向工作电压; 2、快恢复二极管的反向恢复时间一般为...
本文用高效液相色谱法对水中溴氰菊酯经环己烷,乙醚萃取后进行分析,检出限为2.8ng,校准曲线范围为5~100ng/10μl,线性关系良好,r=0.9991,回收率范围为96.0~103.1%,平均回收率为99.8%;溴氰菊酯含量在0.2mg/L,0.4mg/L 时,其相对标准差分别为2.5%,1.6%,常见氯菊酯,氯氰菊酯,氰戊菊酯,生物丙烯菊酯不干扰测定....
(57)< Abstract > < Objective > While to make production cost inexpensive, insutorumentopaneru with 3 and heater itself 4 sides somewhat position shiftBeing generated, absorbing the position shift, auxiliary unit part 1 and insutorumentopaneru 3 on heater itself 4 sides securely fixed yesIt ma...
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