单词 | plate-shale |
释义 | > as lemmasplate-shale ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > shale metal1672 shale1747 shillet1777 plate1794 skerry1844 plate-shale1881 plate rock1893 1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 164 Plate-shale, a hard argillaceous bed. < as lemmas |
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