Photo 051: Bituminous road in grassland.
图051：草原上的道路，每天都被风沙侵蚀。
Bituminous road asphalt pavement planer is a kind of popular road maintenance equipment.
沥青路面铣刨机是一种常用的路面养护机械。
Road : the main bituminous roads, 12m-16m wide, are all constructed according to the National Class II Standard.
道路：干支路宽16-12米之间，均按国家二级公路以上标准设计施工，路面为沥青砼。
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