In this paper erosion-corrosion experiments of four kinds of carbon steels in multiphase flowing freshwater with sand were carried out using a tubbish erosion-corrosion device and linear polarization technique .

利用 圆桶 式冲刷腐蚀实验机，在含砂淡水体系中进行了几种碳钢的冲刷腐蚀失重实验和线性极化电阻 测试， 讨论了冲刷腐蚀 作用的机理。

An instrument that measures the outer profile parameters of piston rings such as conical rings tubbish rings by scanning is introduced .

介绍一种采用扫描 方式 测量锥面环、 桶 面环等活塞环外 圆轮廓参数的测量仪。