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Hearing aids - Specification for dimensions of the nipple and sealing device for insert earphones Ingestion-build-111333 What is this BS 8521-2
Hearing aids - Specification for dimensions of the nipple and sealing device for insert earphones Ingestion-build-111333 What is this BS 8521-2
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Description
What is this BS 8521-2 about
Environmental shock to transit-operable ME equipment
It details the principles described in EN 9223‑100
and to higher concentrations
hazardous situations and events relating to combustion and fuel handling systems
Hearing aids - Specification for dimensions of the nipple and sealing device for insert earphones Ingestion-build-111333 What is this BS 8521-21 Scope This standard is applicable to insert earphones which can be fitted to an earmould inserted into the ear canal.
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