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跨度30米的桁架結(jié)構(gòu)怎么做,?負(fù)載300kg |
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點(diǎn)評(píng)
再加一個(gè),,要想弄明白,,請(qǐng)看《鋼結(jié)構(gòu)設(shè)計(jì)原理》
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