Unverified85% confidenceTradeoffTime unknown
PVC管性价比高、绝缘防腐、施工方便但强度低耐温差；镀锌钢管强度高防机械损伤、可屏蔽电磁但成本高需接地；波纹软管灵活便于弯曲但抗压差、内壁摩擦大穿线费力
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85%
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