由于历史因素，矿山开采本关先南露天采场后北露天采场原则进行。
The mine is adopted to open-mining and underground-mining jointly, and the open-mine is divided into north and south stope.
多娜茜2001年首先离开组合，布伊娜2005年离开单飞，布坎南则在去年被逐出乐队。
Donaghy was the first to go in 2001, with Buena next in 2005 and finally Buchanan was ousted last year.
该技术是南加利福尼亚的3d系统公司先研制出来的，最早的商业立体平版打印机产于1986。
It was pioneered by 3d Systems, based in South Carolina, which made the first commercially available stereolithography machine in 1986.
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