Its key-technology is controlling the pressure of pipeline velocity of gas intake flow and the gas escape point .

置换的关键技术是控制管道的压力、进气的 流速以及 放散点的设置。

It is found that in certain circumstances large errors of the sensed velocity may exist which significantly influence the performance of the escape system .

试验发现，在某些特定的条件下，弹射 速度的测量会出现较大误差从而严重影响 弹射 救生系统的 救生性能。