This paper presents the electrocircuit design of a multi-path ultrasonic gas flowmeter. 介绍了一种多声道超声气体流量计的电路设计。
The air calibrator was reformed as a standard air flowmeter, and it was used to calibrate other small range air flowmeter. 空气校准器被改造成一台标准的气体流量计并成功地应用于其他小量程气体流量计的校准。