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нижнее кольцо stresses
cycl.	crown race (рулевой колонки велосипеда Alexander Dolgopolsky)
mining.	bottom ring

нижнее кольцо: 33 phrases in 17 subjects

Armored vehicles	3
Artillery	1
Automobiles	3
Construction	4
Electronics	3
Explosives and Explosive Ordnance Disposal	2
Geology	2
Mechanic engineering	1
Military	1
Missiles	1
Nautical	1
Oil / petroleum	1
Oil and gas technology	1
Shooting sport	1
Technology	4
Weapons and gunsmithing	3
Wood processing	1