用途：适用于前后直管段长度不能满足单孔孔板标准要求的气体和液体等介质的流量测量、控制和调节。
Use: It is fit for the measurement,control and adjustment of the flow of media such as gas and liquid which the lengths of the front and back pipe can not meet the requirments of single hole orifice .

特点：它具有前后直管段长度要求低、测量精度高、造价低、安装使用维护方便的特点。
Features：a low requirement of lengths for the front and back pipe, a hign measurement precision, a low construction cost, easy mounting、using and maintenance etc.