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rock hard [ˌrɒk'hɑːd] stresses
gram.	твёрдый как камень (Krutov Andrew)

rock hard: 100 phrase in 28 subjects

Advertising	1
Agrochemistry	3
American usage, not spelling	3
Chemistry	1
Construction	5
Figurative	1
Figure of speech	4
General	17
Geology	3
Geophysics	1
Gold mining	8
Idiomatic	3
Makarov	5
Mass media	1
Microsoft	1
Military	3
Mining	9
Music	4
Natural resourses and wildlife conservation	1
Oil / petroleum	4
Oil and gas	3
Oil and gas technology	4
Oilfields	3
Proverb	1
Road works	1
Sakhalin R	2
Seismology	1
Technology	7