实际上，如果你观察磁场的话，变压器和电源配适器等类似的装置，它们都是从磁场里面得到能量。
So actually, if you just look at magnetic fields and transformers or power adapters, and things like that, you precisely extract energy from the magnetic field.
使用元件必须配备调压变压器或可控硅调压器及电压、电流表和温度自动控制仪表等。
To use the elements you should prepare the adjustable transformer or silicon controlled transformer voltage meter current meter and autocontrol temperature meter etc.
通过对装置进行试验，分析了压力、温度、流量等因素对膜分离和变压吸附制得氧气纯度的影响，为装置的进一步改进提供了依据。
Trial use of the device helps analyze such factors as pressure, temperature, and discharge that will affect the purity of the oxygen, and provides proof of improvement.
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