19A3D3D樓承板樓板厚度MM最大適用跨度M型號桁架高度MM上弦、腹桿下弦直徑MM板簡支板連續(xù)3D170708,4,610019183D18080110223D190901202123D11001001302123D111011014022223D112012015022223D270708,4,810019263D280801102263D2909012021283D210010013021283D2110110140...
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