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单词 θ6301
释义
the world > the earth > minerals > mineral deposits > features of stratum or vein > [noun] > bed rock (2)
shelf1671

Mining and Geology. Bed-rock: see quots.

reef1869

Mining (originally Australian). In later use chiefly South African. Unproductive bedrock surrounding gold- or diamond-bearing materials; gangue…

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更新时间:2024/12/23 15:48:17