众所周知,要修复沥青路面下的电缆或管道,按传统的方法是挖个一定面积的坑。挖出来的土堆放在一起,会妨碍道路的交道。 最近,法国制造了一种新型的气动挖土机,可避免上述情况。具体操作是这样的,使用该机时先把地面上的一层沥青掀开,然后接通挖土机的高压压缩机,它能产生7个 As we all know, to repair the cables or pipes under the asphalt pavement, according to the traditional method is to dig a certain area of ​​the pit. Dug up the earth together, will hinder the way of the road. Recently, a new type of pneumatic excavator was manufactured in France to avoid the above situation. The specific operation is this, the use of the aircraft first ground a layer of asphalt lifted, and then connected to the high-pressure shovel compressor, it can produce seven