jumbos造句
Qantasgroundeditsfleetofsixsuper-jumbos.ApplicationofMulti-boomRockDrillingjumbosinAdvancePre-groutingHoleDrillingduringConstructionofMinedTunnels...
Qantasgroundeditsfleetofsixsuper-jumbos.ApplicationofMulti-boomRockDrillingjumbosinAdvancePre-groutingHoleDrillingduringConstructionofMinedTunnels...