The metaphor I like is that of handrails.
我有一个喜欢用的比喻，就是‘扶手’。
It has handrails, platforms and interlocks to provide perfect protection;
附设扶手、平台、自锁扣安全稳固；
Spray the frame, after bending handrails, removable foot care, solid front, solid rear wheel.
喷塑车架，后折弯扶手，可拆脚托，实心前轮，实心后轮。
Spray the frame, after bending handrails, removable foot care, solid front, solid rear wheel.
喷塑车架，后折弯扶手，可拆脚托，实心前轮，实心后轮。
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