多功能小型速算计算器陈益心多功能小型速算计算器比普通计算器可提高工效几倍，它的特点是可把繁琐的数字转变得更为简单。其它计算器需按键几十次才能得到结果，而它只需几次便可知结果，大大减少了键盘操作次数，从而提高了计算效率。如该计算器计算杉木单株蓄积量时，... Multi-function small speed calculator Chen Yi-heart multi-function small speed calculator than ordinary calculator can improve work efficiency several times, which is characterized by the tedious number can be transformed into more simple. Other calculators need to press dozens of times to get the result, but it only needs a few times to know the result, greatly reducing the number of keyboard operations, thus improving the computational efficiency. If the calculator to calculate the volume of Chinese fir, ...