Unverified88% confidenceDecision RuleTime unknown
伸缩杆直径直接决定抗弯变形能力：Φ16-19mm杆适合跨度≤1.2m，Φ25-28mm适合1.2-2m，超过2m跨度必须选Φ28mm以上并加中间支撑，否则中部下垂
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88%
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Long-term
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