说明：  两相管流计算程序代码：从能量平衡微分方程出发与压降等经验关联式联立，得出了油气集输管线沿程温降的计算公式并编制大型计算程序。
(two-phase pipe flow calculation code: starting the energy balance differential equations and simultaneous drop empirical correlation, formula for calculating oil and gas gathering pipelines along the temperature drop and the preparation of large-scale computing program.)