Unverified50% confidenceFactExact time
美国FDA对II类或III类医疗器械要求510(k)上市前通知或PMA预市批准，认证周期通常长达数年，成本高达数百万美元
1
Sources
50%
Confidence
Long-term
Relevance
7/13/2026
First Seen
Sources
四足机器人变轮椅：仿生腿如何重塑无障碍出行
redditr/robotics7/12/2026
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