Unverified80% confidenceTradeoffTime unknown
镀锌钢管防护性和寿命最优但成本高、施工需套丝或卡接、导电需可靠接地；家装普通场景PVC阻燃管已足够，全屋钢管性价比低
1
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80%
Confidence
Long-term
Relevance
-
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