Unverified75% confidenceDecision RuleTime unknown
伞绳数量≥6根且长度为伞面直径的1.2-1.5倍时下降最稳定，伞绳过短会导致伞面不能完全张开而快速坠落
1
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75%
Confidence
Long-term
Relevance
-
First Seen
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