spray plume characteristic
spray plume region
spray plume width
spray shape
spray structure
spraying coating
spraying-ceramic seal ring
Spraymat
spread fading channel
spreading rate
spring analogy
Spring Beginning
spring gradient
spring pivot element
spring recoil adapter
spring sheet-holderspring separation device
spring tape
SPROB
SPTS
spurious drag
spurious effect
spurious returns
Sputnik launch vehicle
sputter erosion
sputter particle
sputter silver
sputtering deposition
sputtering etching
squadron aviation officer
squadron commanding officer
squadron exec
squadron mobile equipment
square course
square cross-section airframe
square cross-section configuration
square cross-section missile
square cylinder
Square Four
square root
square map-subdivision