但其核心是Powertrack电源接线板，它表面是一个不到两厘米宽的沟槽，外面用两片胶皮封闭。
But at its core is a power strip — called the Powertrack — with a single trench less than two centimeters wide, concealed by two rubber flaps.
体育场馆场地照明专用电源装置是场地应急照明关键设备之一，其核心参数是切换时间。
Special power supply for stadium and gymnasium field lighting is one of key equipments for field emergency lighting, this installation's key parameter is transfering time.
DC变换器是开关电源的核心部分，有着极其丰富的动力学行为。
DC-DC converters are the kernel parts in the switching power supplies. There are abundant dynamical behaviors in them.
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