The purpose of this method is to store the currently displayed number into the accumulator, to store the specified operation as well, and to reset the display for input of the next operand.
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。
3
Set manual emergency pump and accumulator so as to have emergency operation at power failure;