数: frequently; repeatedly法: law湍流数: turbulence number紊流数: turbulence number旋流数: swirling number初始流数据: initial flow data流数据传输: stream data transmission毛细流数据: capillary flow data气流数据: airstream data直流数字: dacdic digital to analog converter direct current残数法,差数法: method of residual曲流数和开放曲流数: meandric number河流数目定律: law of stream numbers倍数法: method of multiplicity补数法: complementation参数法: parameter method; parametric meter; parametric method残数法: method of residuals差数法: mismatch method次数法: frequency method大数法: mass method倒数法: counting backward technique滴数法: drop number method点数法: dot grid method; point system读数法: method of reading分数法: fraction method