Unverified85% confidenceCautionTime unknown
不建议购买用回收料生产的劣质PVC管（颜色发暗、有异味、一折就断白），阻燃性差且脆，暗埋后开裂无法补救
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
Sources
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