三下开采风险决策  Under three mining risk decision

闭开-开闭形态学梯度  close-opening-open-closing morphological gradient

地下开采  mine underground; underground mining; undergrourd mining; underground exploitation; underground winning; underground working; under ground mining; underground extraction; Situation; undergound mining

地下开采金属矿山  deep metal mine

地下开放空间  underground open space

地下开挖  underground excavation; subsurface excavation

地下开挖工程  underground excavation engineering

反向电流自动断开开关  automatic reverse current cutout

更开阔的  plus de largeur; plus large

河流下开采  coal mining under a river

河下开采  mining under river

货车下开门  downward swing door

建下开采  Mining under Buildings

金属矿山地下开采  Underground mining of metal mines

井下开采  underground mining

开阔  wide; Open

开阔、宽广  aperto

开阔岸沼  open coast marsh

开阔岸沼泽  open-coast marsh

开阔测试场  Oats