... 海底实验室 undersea laboratory 海下采矿 undersea mining 底部煤层，下伏岩层 underseam ...
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三山岛金矿新立矿区是我国第一个进行海底采矿的硬岩矿山，国内仅龙口在海下采煤。
Xinli mining area of Sanshandao gold deposit is the first hard rock mine which belongs to the under-sea deposit in our country, and only Longkou is mining coal under sea in domestic.
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