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Federative information system of producers on products and services
FISinter
Архив подсистемы «Информация производителей продукции»
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Measuring instruments and gaging equipment
Dosimeter
noise
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Inter
*
Nat.
ISHS-NCH
* ISHS-NCH
For determination of psophometric and unweighted noises and signals in kana l of tone frequency, in audio broadcast channels and sound ñîïðî television driving.