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крепёжный лес stresses
gen.	bois de mines; bois de cuvelage; bois de soutènement
construct.	bois de mine
forestr.	arbre de cuvelage
hydr.	bois d'étaiment
tech.	bois d'étais; bois de chevron; bois de mine (для основной крепи)

крепёжный лес: 10 phrases in 2 subjects

Mining	8
Technology	2