A United States Border Patrol agent checks an area under a bridgecrossing between the United States and Mexico in El Paso, Texas.
塔克·萨斯州埃尔帕索市,一名美国边境巡逻队员正在检查这座联通美国和墨西哥的大桥下的一片区域。
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The square at the new border checkpoint in Meng 'a village is largely deserted. Past a four-storey building, over a bridgecrossing the swift-flowing Nanka river, is Myanmar.
Based on the theory of bridgecrossing scour, the reliability calculation model is established with checking point method, and the model is tested by the sample bridgecrossing.