However, in the final stage of actually making the parts, she enlisted the help of Professor Chen Tieh- cheng of the mechanical engineering department at National Cheng Kung University. Kuo Mei-fang printed out the size and rotational speeds of the gears, and from this Chen Tieh-cheng calculated the number of teeth they should have.
在最後製作階段，她則請成大機械系教授陳鐵城幫忙，她將齒輪的大小、轉速列出，由陳鐵城計算齒輪的齒數。小公務員的天方夜譚