自锁脚踏 ; 卡式踏板
卡式踏板
无定趾器脚踏鞋卡
This new, clipless model is far thinner, just 5.4mm, but it's also taller (76.5mm) and a bit wider (39.6mm), creating a device that is overall slightly larger.
ENGADGET: iPod nano review (2012)
clipless:
clip +? -less
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