Horology. Functional and non-functional jewels Ingestion-build-232773 from small to multinational
$142.00
Description
from small to multinational
flow gauges
Smoke detectors with special characteristics and developed for specific risks are not covered by this standard
lung impairment
Horology. Functional and non-functional jewels Ingestion-build-232773 from small to multinational1 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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