Unverified80% confidenceDecision RuleTime unknown
自行车链条、门锁等要留下润滑膜的部位，选'干性'（挥发后成蜡质干膜，不粘灰）或'湿性'（油膜持久但吸尘）；多尘环境用干性，潮湿环境用湿性
1
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80%
Confidence
Long-term
Relevance
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