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无缝方矩管
发布者:山东方管厂发布日期:2019/9/17 17:08:58点击:105

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比特棋牌  WUFENGFANGJUGUANDESHUXIANGCHENGZAILIZHIZAIWAIHEZAIZUOYONGXIA,BUSANGSHIWENDING,BUCHANSHENGGUODABIANXINGSUONENGCHENGSHOUDE******HEZAI。YAOJISUANWUFENGFANGJUGUANDEWUFENGFANGJUGUANDESHUXIANGCHENGZAILI,XUYAOCONGYIXIALIANGFANGMIANZHESHOU:

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  WUFENGFANGJUGUANWENDINGXINGDEJISUANJIAOWEIFUZA,YAOKANLIANJIEDEFANGSHISHILIANGDUANGUJIEHAISHIYIDUANGUJIELINGYIDUANJIAOJIE。GUJIBUZHISHIYONG1GENLIZHU,SUOYIKEYIJIANDANJISUANCHENGLIANGDUANGUJIE。LINJIEYALIJIANDANJISUAN:P=(4*n*Pi^2*E*I)/[(L/2)^2]。nLIZHUDESHULIANG,pi^2JIUSHIPAIDE2CIFANG,EDANXINGMOLIANG,IGUANXINGJU,LLIZHUZHANGDU;

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