九十年代以来,微电子技术的发展十分迅速,计算机的处理能力不断加强,同时计算机和电子产品的价格在不断降低,使CAD的普及应用成为现实,因而提供了一种功能强大的绘图和设计环境。与此同时,设计内容上也逐渐增加,从只能做常规室内给排水设计发展到能进行室内、外给排水,热水供应、消防、雨水、泵站到集绘图和计算为一体的软件包。 Since the nineties, the rapid development of microelectronics technology, computer processing capabilities continue to increase, while the prices of computers and electronic products continue to decline, making the popularization and application of CAD a reality, thus providing a powerful drawing and design surroundings. At the same time, the design content is also gradually increasing, from only conventional indoor water supply and drainage design to the development of indoor and outdoor water supply and drainage, hot water supply, fire, rain, pumping station to set the drawing and calculation as one package .