Horology. Functional and non-functional jewels Ingestion-build-232773 Financial services
$142.00
Description
Financial services
5AlAs (CW626N)
flow gauges
Smoke detectors with special characteristics and developed for specific risks are not covered by this standard
apparatus including full face mask or mouthpiece
Horology. Functional and non-functional jewels Ingestion-build-232773 Financial services1 Scope This International Standard specifies the technical definitions of functional and non functional horological movement jewels. It describes the different types of jewels used, and how this is to be marked on a timekeeping instrument or used in advertising.
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