rõngavaltspingi vertikaalne rullik valtsimisprotsessi kontrollimiseks; võimaldab erineva läbimõõduga rõngakujuliste toorikute valtsimist (vt rõngavaltsimine)
in ring rolling, a vertical roll of sufficient diameter to accept various sizes of ring blanks and to exert rolling force on an axis parallel to the main roll (see: ring rolling)
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