Unverified78% confidenceSolutionTime unknown
确定周长时若原带已断,可用软尺沿带轮外圈缠绕测量各轮包角段并相加,或按'中心距×2+大轮半周+小轮半周'公式估算,比直接量断带更准
1
Sources
78%
Confidence
Long-term
Relevance
-
First Seen
Sources
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