Unverified85% confidenceDecision RuleTime unknown
暗埋管弯头处应使用弹簧弯管器现场热弯或冷弯成大弧度（弯曲半径≥6倍管径），禁止用直角弯头（三通/直角接头）暗埋，否则后期无法抽换线；直角接头仅适用于明装线槽
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85%
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Long-term
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