[矿业]?露天开采

浅谈普通采煤工艺_建筑科学论文 关键词：采煤工艺，效率，井下开采，露天开采，井田 [gap=335]Keywords: mining technique, efficiency, underground mining, open mining, field

?露天采矿

...露天矿 opencut; open-cast; open-pit; strip mine 露天采矿，露天开采 open mining; opencast mining; opencut mining; open-pit mining; surface mining 青天法［美国证券］ blue-sky law ..

?露采矿区

... 未采矿区 maiden field 露采矿区 open mining 停采矿区 stop-mining area ...