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Och
 OCH
abbr. auto. overhead camshaft
abbr. avia. Nacogdoches, Texas USA; obstacle clearance height
abbr. avia. radio obstacle clearance height
abbr. el. optical channel; outgoing channel
tech. octachlorocyclohexanone
 OCHS
abbr. lab.eq. Ontario Child Health Study
 Och
abbr. earth.sc. orchard
| aye
 AYE
abbr. st.exch. Allegheny Energy, Inc.

OCH [ɔkh] abbr.
abbr., auto. overhead camshaft
abbr., avia. Nacogdoches, Texas USA; obstacle clearance height (MichaelBurov)
abbr., avia., radio obstacle clearance height (Leonid Dzhepko)
abbr., el. optical channel; outgoing channel
abbr., med. oral contraceptive hormone
abbr., securit. option clearing house
tech. octachlorocyclohexanone
Och [ɔkh] abbr.
abbr., commun. Optical channel with full functionality
abbr., earth.sc. orchard
och [ɔkh] n
O&G ocher; ochre
OCHS abbr.
abbr., lab.eq. Ontario Child Health Study