frequency group

Modified HQT extract drops ( high, medium and low frequency) can significantly reduce SP-R mRNA expression in nasal mucosa ( P0.001), in which high and middle frequency group was better than low frequency group.

黄芩汤各频率组均能显著降低鼻粘膜SP-r mRNA的表达量（P0.001），其中高、中频率组优于低频率组，以中频率组疗效最佳。

High Frequency Group Pulse Electrochemical Machining of Ultrathin Structural Parts

超薄结构件的高频群脉冲电解加工工艺研究

Based on lithography technology , the electrochemical lamella machining ( ECLM ) by frequency group pulses was experimentally studied.

进行了基于光刻技术的高频群脉冲微细电化学薄片加工 ( ECLM ) 试验研究.

The Mathematical Model of IGBT Reverse Spike Voltage in High Frequency Group Pulse Electrochemical Machining

高频群脉冲电解加工中IGBT反向尖峰电压的数学模型