A further area where ancient methods were discarded in favor of modern ones was the gear wheels, because "we had to rely on machines--we couldn't have the gears cut to the original shape by hand," says Kuo Mei-fang.
必須舍古就今的，還有齒輪的部份。因為「我們只能靠機械，不可能用人力去切割出古代齒輪的形制」，郭美芳說。