Unverified75% confidenceFactTime unknown
Oral-B圆形刷头因高频旋转振动，其刷毛磨损速度比声波方形刷头更快，实际使用中圆形刷头建议2-3个月更换，声波刷头可用3个月
1
Sources
75%
Confidence
Long-term
Relevance
-
First Seen
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