Unverified85% confidenceCautionTime unknown
无正反转切换功能的电动疏通机，钢缆一旦被堵物反向缠死无法退出，可能导致钢缆断在管内，选购必须确认带正反转开关
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
Sources
Related Entities
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