Unverified85% confidenceDecision RuleTime unknown
疏通器喷头应选带后喷孔(3后1前或4后1前)的旋转喷头,后喷孔产生反冲力自动向前钻进并冲刷管壁,纯前喷头无法自行前进只能对着堵点冲
1
Sources
85%
Confidence
Long-term
Relevance
-
First Seen
Sources
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