curve-curve intersection
transition curve；easement curve；spiral transition curve
a sound mind in a sound body
infra-audible sound (=infrasonic sound)
rate of sound and attenuation of sound
sound absorption-sound insulation-vibration isolation technology
sound intensity and sound intensity level
sound navigation and ranging or sound radar
sound pressure and pressure level of sound
approach to curve by curve
continuous cooling transformation curve CCT curve
C-V curve (capacitance-voltage curve)
operating characteristic curve OC curve
time-distance curve (=travel-time curve)