Reviewing the history and philosophy of chemistry , we consider that the brains of people exist four kinds of views about chemical substance at the present time , which respectively are beeline , triangle , triangle prick , twin triangle prick 同时从化学史和化学哲学的角度进行考察，提出直线型化学物质观、三角形型化学物质观、三角锥型化学物质观和三角双锥型化学物质观是目前为止人们头脑中存有的四种化学物质观类型。
The work principle and identity of the press with cone - shaped roll have been introduced with expounding use of plc to control the production of such machine of which the technology and control have been based as design of the hardware and software of control system 摘要介绍了轴向轧制的双锥辊辗压机的工作原理和特性，阐述应用可编程控制器控制双锥辊轴向轧机的生产，并且针对其工艺和控制要求，从硬件和软件进行了控制系统的设计。
Jzc series concrete mixer is gravity type twin - prick reversed discharging mixer . stirring roller is driven by geared ring , and it will stir deasil and discharge reversely , and can stir plastic , damp dry and hard concrete , fit for common building site , road , bridge project and different concrete component factory Jzc系列混凝土搅拌机系自落式双锥反转出料搅拌机，搅拌筒由圈传动，工作时正转搅拌，反转出料，可搅拌塑性和半干硬性混凝土，适用于一般建筑工地道路桥梁工程及各种混凝土构件厂。
