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местная закалка stresses
auto.	selective quenching
automat.	localized hardening
met.	local hardening; spot hardening; decremental hardening; differential hardening; selective hardening; differential quenching; local quenching; localized quench hardening
O&G	point hardening

местная закалка: 5 phrases in 3 subjects

Metallurgy	2
Technology	1
Wood processing	2