Unverified90% confidenceFactTime unknown
含氟量以ppm标注：0.05%=500ppm，0.11%=1100ppm，标注百分比时可换算判断是否适龄
1
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90%
Confidence
Long-term
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https://kongchang.com/claim/209032API
curl https://kongchang.com/api/v1/knowledge/claims/209032MCP
get_claim(id=209032)