1. This paper particularizes the actuality of intellectual property tax in us, Japan, France and Britain to use for reference. 本文列举了美国、日本、法国和英国等发达国家知识产权税收的现状以资借鉴。
2. Then it particularizes the requirements and the method of wave-soldering and the control method of temperature, wave-soldering, soldering flux etc. 具体说明了波峰焊接机的要求及实现方法以及PLC对温度、波峰、 助焊剂等的控制方法。
3. Chapter two briefly introduces the research regions, data source and partial methods. It also particularizes spatial econometrics and spatial regression model. 第二章，简要介绍了本文的研究区域、数据来源、数据处理和部分研究方法，较详细介绍了空间计量经济学和空间回归模型。
4. The article particularizes the theory, configuration and use ways of turnover drill press clamp under the control of PLC. And finally shows the trapezoid drawing of PLC and hydraulic pressure chart. 详细说明了基于P LC控制的自动翻转夹具的原理、结构和使用方法，并结合实例给出了PLC的梯形图和液压原理图。
