sand model

sand-model exercise

sand ladder

sandtable (sand table)

sand table exercises (STEX)

wet sand-blasting

sand devil

sand particle

sand spreading

sand storm / sandstorm

sand whirl

blowing sand

drifting sand

wet sand-blasting apparatus

have sand in one's hair

sand happy

sand lot

sand map

sand rat

sand table

sand-lot problem

brisance sand test

model agreement

terrain model

terrain model exercise

exponential decay model

balanced force allocation model

battle focus requirements model

tow bar model

United States rifle, model 1903

engine-powered model

tunnel free-flight model testing

reference model