Acoustic feature of mass

Acoustic feature of mass (observable entity)

active

Code	`420415002`
Semantic tag	observable entity
Module	international
Definition	primitive
Effective time	20060731

Parents (2)

364639007Feature of a mass observable entity
421469009Ultrasonographic observable observable entity

Children (2)

422004007Acoustic reflectivity observable entity
420527001Acoustic shadowing observable entity