One was the laminar flow in the pipe(also called the Poiseuille flow). The analytic form of the relationship between the flow rate and the pressure gradient along the pipeline was obtained.
其一是圆管层流（又称泊肖叶流动），得到其流量和沿管方向压力梯度之间的解析关系式。
2
An analytic method was recommended, which was easy to operate and cowld save reagent. The gradient range was determined to standardize operation and conduct quality control.