主要尺寸（mm）H12.7202025253132343636B15.9151518232514252631.5b1.61.21.51.53.52.51.93.52.53.2截面面积理论重量（cm2）（kg/m）0.6880.5780.7210.8852.2671.9001.0002.7642.0752.9600.1910.1630.2000.2460.6300.5280.3030.7680.5770.823主要尺H384450808080100100100mm）
序 号12345678910序 号111213141516171819主要尺寸（mm）B252519303540303540b342.5344344截面面积理论重量（cm2）（kg/m）2.6133.6902.1024.0205.6806.0804.6206.4806.8800.7261.0010.5841.1181.5791.6901.2841.8011.913
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