厚层泥岩
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厚层泥岩；泥质板岩；[机] 厚层泥岩
n. a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages
厚层泥岩；泥质板岩；[机] 厚层泥岩
n. a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages
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