Unverified90% confidenceDecision RuleTime unknown
认准门框内侧或铰链侧钢印的'FAM'标识及等级字母(甲J乙B丙C丁D),无钢印或仅商家口头宣称的'甲级'不可信,钢印是国标强制要求
1
Sources
90%
Confidence
Long-term
Relevance
-
First Seen
Sources
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