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单词 guiding-bed
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guiding-bed
guiding-bed n. Coal Mining (see quot. 1883).
ΚΠ
1883 W. S. Gresley Gloss. Terms Coal Mining Guiding Bed, a thin band or seam of coal, &c., in a nip leading to the regular seam on either side of it.
extracted from guidingadj.
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更新时间:2025/1/24 17:51:54