COMPONENTS FOR USE IN A DEVICE WHICH EMPLOYS ACOUSTICS AND/OR OPTICS; MATERIALS OF CONSTRUCTION FOR USE IN A DEVICE WHICH EMPLOYS ACOUSTICS AND/OR OPTICS; ELECTRICAL COMPONENTS FOR CONVERSION AND TRANSMISSION OF DATA GENERATED BY A DEVICE WHICH EMPLOYS ACOUSTICS AND/OR OPTICS; ULTRASONIC APPARATUS; MATERIALS OF CONSTRUCTION USED IN ULTRASONIC APPARATUS; ELECTRICAL COMPONENTS FOR CONVERSION AD TRANSMISSION OF DATA COLLECTED FROM AN ULTRASONIC DEVICE; ACOUSTIC AND/OR OPTICAL DEVICES USED TO MEASURE OR SENSE FLUID FLOW; AND ACOUSTIC AND/OR OPTICAL DEVICES USED TO DETECT FLAWS IN METAL STRUCTURES
Electrical and Scientific Apparatus