AS

Informative symbols for use on electrical and electronic equipment - Hydrophone
standard by Standards Australia, 01/01/1978

Informative symbols for use on electrical and electronic equipment - Band-pass filter with variable centre frequency
standard by Standards Australia, 01/01/1978

Informative symbols for use on electrical and electronic equipment - Recording on an information carrier
standard by Standards Australia, 01/01/1978

Informative symbols for use on electrical and electronic equipment - Monitoring output data during read-out reproduction from an information carrier
standard by Standards Australia, 01/01/1978