"Since these were only sketches, the dimensions could not be completely accurate, but an error of just a few millimeters is enough for the gears not to mesh properly," says Kuo Mei-fang. For this part of the work, modern computers were a tremendous help.
「只畫草圖，呎寸畢竟無法那麼精密，才差零點幾公分兩個齒輪就無法咬合」，郭美芳說，在這部份，現代的電腦倒是幫了大忙。