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постепенное разрушение stresses
auto.	gradual failure
econ.	erosion (A.Rezvov)
Makarov.	gradual damage
qual.cont.	progressive failure
quant.el.	degradation damage
seism.	successive failure
tech.	degradation failure; stage-by-stage failure

постепенное разрушение: 2 phrases in 2 subjects

Economy	1
Makarov	1