impact of the recoil的意思|示意

So reducing the impact of recoil is the key problem to improve the overall performance of long-distance aerodynamic extinguishing cannon.

因此，减小后坐力的影响是进步远程气动灭火炮整体性能的关键题目之一。

All test mediums shall be discharged at a proper place outside; attention shall be paid to the impact of recoil as well as the requirement for safety and environmental protection.

试验介质宜在室外合适地点排净，排放时应考虑反冲力作用及安全环保要求。