Yammen APDS, โชติมล ป, ศรีสิงห์ ไ. The Development of a Spirometer with Pitot tube sensors. NUEJ [internet]. 2017 Jul. 11 [cited 2026 Sep. 11];12(1):47-54. available from: https://ph01.tci-thaijo.org/index.php/nuej/article/view/63511