The image below is a single 20-second exposure taken with a red-green-blue filter.
下图是用红-绿-蓝滤光片拍摄的单一20秒曝光照片。
A power supply designed for low power application may use a single capacitor filter.
电源的低功耗设计，应用程序可以使用一个单一的电容滤波器。
A power supply designed for low power application may use a single capacitor filter.
专为低功耗应用的电源可以使用一个单一的电容滤波。
Double current hysteresis optimal state control method in single active filter is proposed.
提出了单相有源滤波器双滞环电流比较状态优化控制方法。
General single phase filter, low price, easy to install.
常规通用单相滤波器，价格优惠，安装简单；
General single phase filter, low price, easy to install.
常规通用单相滤波器，价格优惠，安装简单；
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