烟囱内直径简易测量法——“矩形法”的探讨

Measurement on Interior Diameter of Chimney——Discussion about rectangle method

烟囱内直径是烟气测试中的重要参数，利用“矩形法”就能简易而准确获得烟囱内径，攻克了在烟气环境监测工作时不能设置准确内径的难题。

Interior diameter of chimney is a very important parameter in the test of gas. It is very simple to get accurate interior diameter with the method of rectangle. Difficult problem which can not set accurate interior diameter has been solved while monitoring environment.