...安装光盘随机软件：驱动光盘兼容操作系统：Windows95,98.2K,XP,7惠普LaserJet1020：电力规格电源电压（V）：AC220V电源频率（Hz）：50-60惠普LaserJet1020：外观参数颜色：白色 【hp1020打印机特性介绍】惠普 LaserJet 1020外型简单大方，整体呈现正方体形状，...
基于1180个网页-相关网页
电源频率偏差 power frequency deviation
耐电源频率磁场测试 Magnetic Field
电源频率指示器 mains frequency indicator
额定电源频率 Rated Frequency
电源频率控制 power frequency control
电源频率控制器 power frequency controller
电源频率控制回路 power frequency control loop
电子电源频率调节装置 electronic power frequency control system
电源频率下的试验 Tests at power frequencies
·2,447,543篇论文数据，部分数据来源于NoteExpress
交流供电的源通常具有很高电平的电源频率共模电压(常常有几伏)。
An AC powered source usually has a significant level (often several volts) of line frequency common mode voltage.
因此它可以把“两倍于电源频率的直流电”进行“平滑化处理”，成为一个接近恒定的直流电。
Therefore it can be seen that it will "smooth" the "twice mains frequency DC" into a near constant DC voltage.
ASTM D149固体电绝缘材料在工业电源频率下的介电击穿电压和介电强度的试验方法。
Standard Test Method for dielectric breakdown voltage and dielectric strength of D149 ASTM solid electrical insulating materials at industrial power frequencies.
应用推荐