基于T型滤波器的调光方法，能在很窄的工作频率范围内实现深度调光，同时具有灯电流波峰因数低的优点。
Based on T type filter, the new ballast can achieve a wide dimming range with a very narrow frequency variation range, and it can operate with low lamp current crest factor.
基因数据也为非洲起源论点亮了一盏灯，非洲起源论猜想蜜蜂源于非洲，然后通过两次迁徙散布到欧洲和亚洲。
The genome data sheds light on the process of Africanization by suggesting that Apis mellifera originated in Africa, then spread to Europe and Asia in two separate migrations.
基于常用的L6561芯片，设计了宽输入输出范围的400瓦金属卤化物灯电子镇流器功率因数校正电路。
Base on chip L6561, a PFC preregulator for 400w metal halide lamp ballast is designed with wide input and output range.
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