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以孔板φ８０ｍｍ测流中１０组孔板流量ｑｖ和孔板差压随机数据为例，用数理统计法证明孔板流量呈正态分布；导出孔板流量系数ｋ值一般计算方法；最后证明孔板流量ｑｖ和孔板差压线性回归效果极显著．
Taking 10 sets of orifice flow qv and orifice differential pressure random data as an example, the flow of orifice plate is normal distribution with the mathematical statistics method. The general calculation method of orifice orifice flow coefficient k is deduced. Finally, Plate flow qv and orifice differential pressure linear regression results are significant.