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黏土质页岩 niántǔzhì yèyán
bridg.constr. clay shale; argillaceous shale
hydroel.st. batt
oil grapholith
tech. dunn bass
黏土〔沥青〕质页岩
gen. batt
黏土质页 岩
: 4 phrases in 2 subjects
General1
Technology3