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силурийская
 силурийский
dril. Sil
| эра
 эра
gen. age; aeon; epoch; times
geol. era
math. division
O&G, oilfield. division
ocean. era
- only individual words found

to phrases
силурийский adj.stresses
dril. Sil (Silurian)
geol. Silurian
силурийская: 35 phrases in 8 subjects
Construction2
General1
Geochronology2
Geology24
Makarov1
Oceanography & oceanology1
Paleontology1
Stratigraphy3