earthwork digging

英 美
  • 土方开挖
    1. In an earthwork,the conveyance is like a consumer due to waiting for necessary loading capacity,and then an excavator is the same as a service system.
      在土方开挖工程中,汽车要等待挖土机挖土,汽车就是顾客,挖土机就是服务机构,二者形成一个排队系统。