2. SunTour also made a combined
freewheel plus rear hub, called Unit-Hub, in 1969 for small wheel bicycles.
山图也发了联合飞轮加上后轮,称为股枢纽于1969年,小轮自行车。
3. By narrowing the sprockets, spacers, and chain width, they made a 6-speed
freewheel that was the same width as a 5-speed and fitted on a 120-mm hub.
通过缩小链轮,垫片,和连锁宽度,也提出了6速飞轮这是作为一个5速和1120毫米枢纽配备相同的宽度。