Unverified80% confidenceTradeoffTime unknown
弹簧越长越粗越能应对深层顽固堵塞,但越难收纳且不适合弯曲较多的管道,家用一般5m内足够,超10m多为工程需求
1
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80%
Confidence
Long-term
Relevance
-
First Seen
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