All 4 Uses

conveyor belt
in
The Mark of Athena
(Auto-generated)

Ancient-looking bronze and leather conveyor belts trundled along with stacks of weapons and armor, sort of like the Amazons' warehouse in Seattle, except this place was obviously much older and not as well organized.†
p. 504.8
It clicked and whirred along a conveyor belt, got hooked on a rope, and ascended through a slot in the roof.†
p. 505.2 *
Percy started across the room, picking his way around conveyor belts and moving platforms.†
p. 505.7
Meanwhile Ephialtes laughed as he pushed buttons on his control board, cranking the conveyor belts into high gear and opening random animal cages.†
p. 517.6

Definitions:

(1) (conveyor belt)
a moving band or belt that transports objects -- such as goods in a factory
(2) (meaning too rare to warrant focus)