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болт с круглой головкой stresses
auto.	ball-headed bolt
construct.	cup head bolt
el.	case bolt
nautic.	cheese-head bolt
tech.	round-head bolt; finished bolt (Juls!)
transp.	ring head bolt
болт с круглой сферической головкой
mech.eng., obs.	button head bolt; round head bolt

болт с круглой головкой: 4 phrases in 3 subjects

Construction	1
Forestry	1
Mechanic engineering	2