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焊管規(guī)格 h b t Ix(cm4) 50 30 3 4.44 3.49 14.21 50 30 3.5 5.11 4.01 16.01 50 50 3 5.64 4.43 20.85 50 50 3.5 6.51 5.11 23.59 60 60 3 6.84 5.37 37.14 60 60 4 8.96 7.03 47.07 70 70 3 8.04 6.31 60.27 70 70 4 10.56 8.29 76.95 80 40 3 6.84 5.37 55.85 80 40 4 8.96 7.03 71.13 80 80 3 9.24 7.25 91.45 80 80 4 12.16 9.55 117.38 100 80 4 13.76 10.80 199.45 100 80 5 17.00 13.35 241.42 100 80 6 20.16 15.83 280.50 10