правило Прандтля-Глауерта
boundary layer approximation by Prandtl
Prandtl boundary layer
Prandtl boundary layer theorem
Prandtl boundary layer theory
Prandtl hypothesis
Prandtl mixing length
Prandtl mixing-length theory
Prandtl relation for normal shock waves
Prandtl-Meyer expansion
Prandtl-Meyer flow
mil rule / scale
rule of law
slide rule
strong-arm rule
aiming rule operator
aiming rule
alidade rule
gun rule
decision rule
rule
rule-making
nautical slide rule
parallel rule(r)
one half thickness rule
safe pocket rule
mil rule
radiation slide rule