spec - spro
- special equipment
- special purpose machine tool
- special steel
- specialization
- specific consumtion
- specific discharge
- specific fuel consumption
- specific gravity
- specific gravity bottle
- specific heat
- specific heat at constant pressure
- specific heat at constant volume
- specific heat consumption
- specific humidity
- specific oil consumption
- specific power
- specific resistance
- specific speed
- specific stiffness
- specific strength
- specific thrust
- specific volume
- specific weight
- specific weight of engine
- specifications
- specimen
- spectrometer
- spectroscope
- spectrum
- spectrum analysis
- speech recognition
- speed
- speed change
- speed change gear
- speed change lever
- speed changer
- speed control
- speed cutting steel
- speed governor
- speed increaser
