Longradar offer approximate ten thousand of products of pressure , vacuum , flow , air velocity , temperature , humidity , level and valves , which are commonly applied in the fields of industrial automation , hvac , building autoimmunization control , electric power , petroleum , chemical industry , boilers , water treatment , compressors , freezing refrigeration , food brewage , pharmacy , light industrial , environmsent protec - tion , clean industry etc 在上游安装一个带有蛋形格栅的椭圆形流体喷嘴，可以提供一个精确构造简单的空气体积测量系统。在喷嘴的出口，空气释放时的风速分配是一致的静压为零。因此，喷嘴上游的总压力是喷嘴出的速度压力-于是就容易计算体积了。
