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двутавровое железо stresses
gen.	I bar; I beam
auto.	H-iron (с широкими полками)
construct.	double iron; double Т-iron
geol.	i-bar
Gruzovik, build.mat.	double I-steel
mech.eng.	H-bar
mech.eng., obs.	double T-iron (сталь)
mining.	I-iron; double T-iron
tech.	I-steel; double T-steel; H-beam
transp.	H-iron

двутавровое железо: 20 phrases in 3 subjects

Mechanic engineering	15
Mining	4
Shipbuilding	1