The main content of each chapter is as following . the first chapter at first generally introduced the history and the actuality of flowmeter on the basis of relevant publications search . one of most promising flowmeter - the vortex type fluid oscillatory flowmeter - was selected as research subject 有关各章内容分述如下：论文第一章以大量的国内外文献为基础，全面综述了流量计的发展历史和现状，确定以具发展前途的流量计之一? ?旋涡型流体振动型流量计(涡街流量计和旋进旋涡流量计)作为研究内容。
