boom excavator

英 美
  • 臂式挖土机,吊杆挖土机
  • boom n.繁荣;兴旺;激增;低沉声n.帆杠;吊杆;支臂;尾桁;水栅vi.急速增长;发出低沉声vt.使兴旺;促进
  • excavator n.打洞机;挖掘者;开凿者
    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。