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古生界 gǔshēngjiè
agric. Palaeozoic group (gruppa palaeosoica)
dril. Palaeozoic erathem
eng.geol. Paleozoic Erathem
hydroel.st. Palaeozoic Group; Paleozoic
oil Palaeozoic; Paleozoic erathom
tech. Paleozoic group
古生界 gǔshēngjiè
geol. Palaeozoic
古生界【代】 gǔshēngjiè
geol. Palaeozoic
古生界: 7 phrases in 4 subjects
Drilling2
Engineering geology1
Oil / petroleum3
Technology1