fore and after造句

The variation of water and sand is studied under the influence of the rainfall and human activity , in the fore and after management of small watershed in gully region of the loess plateau
摘要以西峰杨家沟小流域为研究对象，研究了在降雨和人类活动的影响下，黄土高原沟壑区小流域治理前后水沙变化。
This system tests 19 parameters such as the pressure of fore and after main fluid pumps and every sub fluid pumps " , force of pedal , turn angle of steering wheel , speed of every wheels and car body , and calculates 9 correlation analyses according to the gb112676 - 1999 " automobile system structure , capability and test methods " and gb7258 - 1997 " technical regulation of automobile safety " , also it can generate data report automatically
该系统对汽车制动过程中前后液压总泵出口液压、各制动分泵进口液压、脚踏板力、方向盘转角、各车轮转速、车体速度等共计19个物理量进行测试。系统硬件由便携式计算机、数据采集器以及相应传感器组成。硬件设计中采用了模块化设计思想，使得测试系统体积小、重量轻、抗振动、安装拆卸方便、易于维护、可以进行随车实测试验。
It's difficult to find fore and after in a sentence. 用fore and after造句挺难的