Enfield topography (p. 241)
regional shiny-truck, land-barge, and catapult facilities for the O.N.A.N.-subsidized Empire Waste Displacement Co. (what the Québecois call les trebuchets noirs, spectacular block-long catapults that make a sound like a giant stamping foot as they fling great twine-bundled waste-vehicles into the subannular regions of the Great Concavity at a parabolic altitude exceeding 5 km. […])
Context
The township inventory: the catapults that feed the "subannular regions" of the Concavity are Enfield's local industry, blocks from E.T.A. The launch end of the great ring is hometown infrastructure, with its own Québecois nickname.