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䓊AɰܵďָĂď
1ͬһӣȿ϶жڲ䓊Aɰ܁f㆖Ҫǃɂһ̓ȉͨfĉȼһ≺^ĭh(hun)
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2ʲôǭh(hun)ȣ
ЄȵȼSN=EI/D3ͨN/m2λEIعSλLȃȹܱڭh(hun)DܵƽֱȼPN0.10.61.01.62.02.5MpaȼSN12502500500010000N/ m2
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