BS ISO 1438:2017定义了矩形和三角形（V形缺口）薄板的使用要求 在自由流动条件下测量明渠清水流量的堰。它包括 淹没（淹没）水流中全宽矩形薄板堰的使用要求 条件交叉引用:ISO 772:2011 Ed 5 ISO 4373:2008 Ed 3ISO/TS 25377:2007 Ed 1ISO/IEC 17025:2005 Ed 1ISO 18365:2013 Ed1购买本文件时，所有当前可用的修订版均包含在购买本文件中。

BS ISO 1438:2017 defines the requirements for the use of rectangular and triangular (V-notch) thin-plate weirs for the measurement of flow of clear water in open channels under free flow conditions. It includes the requirements for the use of full-width rectangular thin-plate weirs in submerged (drowned) flow conditions.Cross References:ISO 772:2011 Ed 5 ISO 4373:2008 Ed 3ISO/TS 25377:2007 Ed 1ISO/IEC 17025:2005 Ed 1ISO 18365:2013 ED1All current amendments available at time of purchase are included with the purchase of this document.