Aiming at the problem of long refueling time of normal refueling quantity for one aircraft ground pressure refueling system, a new system optimal design method was proposed.
针对某型飞机地面压力加油系统存在的常用加油量加油时间过长的问题，提出了一种新的系统优化设计方案。
2
On study GB (national standard) and analysis practice, aiming at the features of ground water sample, proposed an optimal test method.
通过对国标方法的研究，结合分析实践，针对地表水样品的特点，提出了优化分析方法。
3
At last, aiming at utilization condition of pesticide in China, the suggestion on pesticide polluting ground water research and limiting indexes of pesticide in ground water were put forward.