Assertion: screw conveyor | /r/ObjectUse | used on vertical plane
Facets:
value: less frequently
type: DEGREE
Source sentences:
text: Screw conveyors are used to move powdered and fine-grained materials in the horizontal plane or on an incline up to 20 percent (see Figure 3); less frequently they are used on the vertical plane (conveyors with rapidly turning screws).