TY  - RPRT
TI  - Online process control for directional solidification by ultrasonic pulse echo technique.
AU  - A Drevermann
AU  - C Pickmann
AU  - R Tiefers
AU  - G Zimmermann
PY  - 2004
DO  - 10.1016/j.ultras.2004.01.010
UR  - https://pubmed.ncbi.nlm.nih.gov/15047269/
ID  - 15047269
ER  -