钢筋混凝土管
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1100120013001400150016001700180019002000
17.621.622527.9530.63335.3537.539.5241.4543.34546.748.45051.55354.4855.9
0.000370.000450.000520.000586950.00064260.0006930.000742350.00078750.000829920.000870450.00090930.0009450.00098070.00101640.001050.00108150.0011130.001144080.0011739
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