ISO 7194:1983 封閉管道中流體流量的測量 利用流速計或皮托靜壓管對圓形管道中非對稱流或旋渦流流量測量的速度,面積法
Measurement of fluid flow in closed conduits; Velocity-area methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current-meters or Pitot static tubes