spro - stea
- sprocket
- sprocket hob
- sprocket milling cutter
- sprocket shaft
- sprocket wheel cutter
- sprue
- sprue runner
- sprung mass
- spur bevel gear
- spur gear
- spur gear differential
- spur gearing
- sputtering
- square
- square bar
- square file
- square head
- square head bolt
- square head screw
- square headed screw
- square key
- square nut
- square steel
- square thread
- square washer
- squeeze molding machine
- squeeze type core making machine
- squeezer
- squeezing
- squeezing roll
- squill vice
- squirrel cage motor
- squirrel cage rotor
- stability
- stability criterion
- stabilizer
- stabilizing annealing
- stable equilibrium
- stable state
- stack draft
