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9. Udachnaya Pipe-Russia 俄罗斯乌达奇纳亚钻石矿洞
The Udachnaya Pipe is a diamond mine in Russia. The owners of the mine plan to cease its operations in 2010 - in favor of underground mining. The mine was discovered in 1955 and is over 600 meters deep
这是俄罗斯一处钻石矿，矿主计划于2010年停止采矿，这样将有利于地下开采。据悉，乌达奇纳亚钻石矿是于1955年被发现，现已被挖掘600米深
