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sudden drop stresses
Makarov.	резкий перепад; резкое падение
radioloc.	провал (резкое падение)

sudden drop : 20 phrases in 10 subjects

General	1
Idiomatic	2
Makarov	2
Mechanic engineering	1
Metallurgy	1
Mining	1
Non-destructive testing	7
Rail transport	2
Seismology	1
Space	2