防止进入下水道、排洪沟等限制空间。
To prevent access to sewers, flood discharge trench so limited room for maneuver.
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.
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.
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