C 型钢材国家标准规定是多少，如2毫米尺寸，水到多少为合格。

2007-09-01 10:321,槽80x40x15x2.0,80,40,15,2,14.52,33.6,347,341600,77900,462,112900000
2,槽100x50x15x2.5,100,50,15,2.5,17.06,39.4,523,813400,171900,1090,352800000
3,槽120x50x20x2.5,120,50,20,2.5,17.06,40.3,598,1294000,209600,1246,660900000
4,槽120x60x20x3.0,120,60,20,3,21.06,48.7,765,1706800,373600,2296,1153200000
5,槽140x60x20x3.0,140,60,20,3,19.64,46.1,825,2454200,394900,2476,1589800000
6,槽150x50x20x1.6,150,50,20,1.6,15.24,27.2,422,1362930,141870,360,663830000
7,槽150x50x20x2.0,150,50,20,2,15.24,27.2,528,1703660,177330,700,629790000
8,槽150x50x20x2.5,150,50,20,2.5,15.24,27.2,660,2129580,221660,1380,1037230000
9,槽150x50x20x3.0,150,50,20,3,15.24,27.2,792,2555490,266000,2380,1244530000
10,槽150x60x20x1.6,150,60,20,1.6,19,45,451,1514130,214620,390,995870000
11,槽150x60x20x2.0,150,60,20,2,19,45,564,1892660,268520,750,1244840000
12,槽150x60x20x2.5,150,60,20,2.5,19,45,705,2365830,335650,1470,1556050000
13,槽150x60x20x3.0,150,60,