Unverified80% confidenceDecision RuleTime unknown
判断拉链顺滑度和寿命：检查拉头是否有自锁结构、链牙咬合是否均匀、拉合时无跳齿卡顿；正品YKK拉头背面有YKK刻印，无刻印或刻印模糊多为仿品，防锈和顺滑度均无保障
1
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80%
Confidence
Long-term
Relevance
-
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