Assertion: abacus's frame | /r/MadeOf | bead
Facets:
value: on vertical rods
type: LOCATION
Source sentences:
text: Both abaci (yes, I will switch plurals on a whim) consist of rectangular frames containing beads on vertical rods, with a reckoning bar dividing the lower and upper beads, also called the earth beads and heaven beads.
text: The frame contains horizontal rods and the beads which have holes are passed through the rods.