介绍用图解法设计排洪沟的实用经济断面，此法可达到快速、优化设计的目的，并且具有通用性好，形象直观的特点。
It introduces a diagram method for design of flood discharge trench utility section, which is more universal and vivid and can attain the goal of quick& optimized design.
本文提出的支管优化设计的图解法，可用于两种管径的管段组成的支管设计。
In this paper is presented a diagram method of optimal design for sprinkler lateral, by which can be designed the laterals with two diameters.
为进行能量系统的分析和优化，进行了全新图解分析方法的热经济学结构理论研究。
Semi-graphic and semi-analytical method of thermoeconomic structural theory is studied to analyze and optimize complex energy system.
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