Based on PWM technique, the energy from battery discharges return to the master tape of DC, which has the advantage transmitting energy through two directions and realizes energy callback.
采用PWM调节方式，实现了能量的双向传递，将电池放电能量回馈到直流母带，解决了电池放电能量利用这一技术难题。
On his return to California, in February 1983, he dictated the first of the pieces contained in this volume into a new Sony tape-recorder.
1983年2月1日，他一回到加州，立刻就在一台新的索尼录音机上录制了本书的第一篇。
On his return to California, in February 1983, he dictated the first of the pieces contained in this volume into a new Sony tape-recorder.
1983年2月1日，他一回到加州，立刻就在一台新的索尼录音机上录制了本书的第一篇。
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