silica gel - sliplining
- single span bridge
- single span structure
- single story building
- single strength glass
- single swing door
- single swing frame
- single toggle jaw crusher
- single track railway bridge
- single track-mounted hoist
- single web
- single web system
- single welt
- single window
- single-acting compressed-air hammer
- single-acting hammer
- single-acting hand pump
- single-acting steam hammer
- single-aisle building
- single-angle strut
- single-arch bridge
- single-arm semaphore
- single-armed lever
- single-bascule bridge
- single-bay portal
- single-bucket
- single-bucket excavator
- single-bucket loader
- single-cantilever
- single-cantilever gantry crane
- single-casement window
- single-cell bin
- single-claw
- single-degree system
- single-degree-of-freedom system
- single-disk valve
- single-drum hoist
- single-drum wheel-drive roller
- single-ended flat spanner
- single-engine scraper
- single-family dwelling