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пробная нагрузка stresses
avia.	surcharge d'épreuve
chem.	charge d'épreuve
construct.	essai de charge; essai de chargement
hydr.	essai du charge; essai du chargement
mech.eng.	charge d'épreuve; surcharge d épreuve
met.	charge d'essai
trucks	charge d'essai

пробная нагрузка: 9 phrases in 4 subjects

Construction	2
Hydraulic engineering	5
Mechanics	1
Mining	1