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твёрдое образование stresses
geol.	hard formation

твёрдое образование: 31 phrases in 18 subjects

Aluminium industry	2
Armored vehicles	1
Cement	1
Construction	1
Firefighting and fire-control systems	1
General	1
Industry	1
Literature	1
Makarov	5
Metallurgy	2
Military	1
Oil / petroleum	2
Polymers	2
Refrigeration	1
Road works	2
Sakhalin	1
Silicate industry	1
Technology	5