L/==120.02-0.004 2 XI-x2 X1=0.009 所以=1.5X=1.5×0009=00135 △y (H1-)-(H2-H2)(0.02-0.0135)-0.002 =000382 0.02-0.0135 0002 Y2-Y2 bo≈上-y20.02-0002471 0.00382 z'=Ho×Na=1.44×4.71=678m 所以z-Z=6.78-4=278m2 0.02 0.004 / 1 2 1 1 2 =  − =  −  −  = X X X Y Y L V X1  = 0.009 所以 1 =1.5 1  =1.50.009 = 0.0135   Y X 0.00382 0.002 0.02 0.0135 ln (0.02 0.0135) 0.002 ln ( ) ( ) 2 2 1 1 1 1 2 2 = − − − =  −  − −  −  −   =     Y Y Y Y Y Y Y Y Ym 4.71 0.00382 1 2 0.02 0.002 = − =  −   = m OG Y Y Y N Z = HOG  NOG  =1.44 4.71 = 6.78m 所以 Z − Z = 6.78− 4 = 2.78m