[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

检测涂层/油漆表面铅时,化学试剂笔需要先破坏或刮开涂层使试剂接触内部,否则完整光滑涂层可能不显色而漏检;购买前确认说明书是否要求刮擦取样

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Long-term
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