The utility model relates to a drainage grid for high roads, urban roads and other places, particularly a device for self-cleaning the foreign matters of the drainage grid.
本实用新型涉及一种公路、城市道路及其它场地的排水篦子，特别是排水篦子自动清理杂物的装置。
The line sink drainage element method was proposed to solve the problem that small FEM grid was needed near drainage holes due to the high hydraulic gradient at the cost of time consuming.
为模拟排水效应并解决排水孔附近水头梯度大、有限元网格划分细而显著增加计算量的问题，提出了汇线单元法。
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