沃瑟发表这番言论之前，该集团公布，按照当前供应成本(current cost of supply)计算，07年第三季度收益下降8%，至63.9亿美元，原因是炼厂利润率和销售量下滑。
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The functions of direct current supply of accumulator were introduced. The operation results showed that the power supply had a good operation effect, and a low cost.
介绍了蓄电池直流电源的作用及功能，运行结果表明，该电源运行效果良好且成本低。
The circuit has some advantages, such as low supply voltage, wide-band, the high accuracy of voltage and current transfer, low-cost, and good practical Properties so on.
该电路具有电源电压低、频带宽、电流传输精度高、及成本低廉且实用性好的特点。
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