E1C3H4O1G2R1A1M3
16 points
ECHOGRAM is validvalid
a record produced by a device that uses ultrasonic waves [n ECHOGRAMS]
a record produced by a device that uses ultrasonic waves [n -S]
a record produced by a device that uses ultrasonic waves [n ECHOGRAMS]
a record produced by a device that uses ultrasonic waves [n -S]