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BS EN 50411-2-5:2009
Fibre organisers and closures to be used in optical fibre communication systems. Product specifications. Sealed closures for air blown fibre microduct, type 1, for category S & A (British Standard)
This specification contains the initial, start of life dimensional, optical, mechanical and environmental performance requirements which a fully installed blown fibre protected microduct closure must meet in order for it to be categorised as an EN standard product.
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British Standards Institution [bsi]