Unverified80% confidenceCautionTime unknown
堵塞位置不明或疑似管道破裂、错位时不要盲目用大扭矩疏通机,钢缆可能顶破老化PVC管或卡在破裂处,应先用管道内窥镜检查
1
Sources
80%
Confidence
Long-term
Relevance
-
First Seen
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