TY JOUR TI About Ultrasonic Inspection of Work Pieces and Products from Carbon-Carbon Composite Materials KW nondestructive testing KW rocket engineering KW quality KW structure KW defects KW material characteristics KW composite KW acoustic method KW ultrasonic waves JO NDT World AU Berkutov, I.. AU Bychenok, V.. AU Mayorov, A.. PY 2015 IS 19 PB LLC SVEN