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stratified rock
el. 成层岩【地质】
hydroel.st. 成层岩; 层状岩体
railw. 层状岩层
tech. 岩层; 成层岩 (石); 沉积岩; 层状岩石
stratified rocks
construct. 成层岩
tech. 成层岩类
stratified rock
: 4 phrases in 3 subjects
Bridge construction1
Oil / petroleum1
Technology2