BS 4009:1975
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Specification for an artificial mastoid for the calibration of bone vibrators used in hearing aids and audiometers
Hardcopy
28-02-1991
English
31-07-1975
Basic features of an artificial mastoid for objective calibration of bone vibrators used in hearing aids and audiometers.
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