《o》

object

objective

obligation

oblique

obscure

obscure glass

obscure wire glass

observation

observation window

observe

obsolete

obstacle

obstruction

obverse

occupation

occupy

octagon

octahedral

octal print punch

octane

October

odometer

of true position

offensive (ammunition)

office

officer

official

offset

offset aiming point

offset printing press

ohmmeter

oil burner

oil catcher

oil circuit breaker

oil circuit recloser

oil cleaner

oil control

oil cooled

oil cooler

oil differential

oil dipstick

oil filter

oil immersed

oil insulated

oil level

oil nozzle

oil pan

oil plug

oil pressure

oil pump

oil ring

oil screen

oil seal

oil suction pump

oil switch

oil tank

oil-cooled

oil-immersed

oil-immersed water-cooled

oil-insulated

oil-insulated fan-cooled

oil-insualted self-cooled

oilproof

oiltight

olive drab

omnidirection

on center

on vehicle equipment

one pole

one shot

one shot multivibrator

one stage

one-way

opalescent indicating light

opaque

open dripproof

open dripproof protected

open end

open hearth

open type control circuit contacts

open-close-open

open-joisted

open-window unit

opener

opening

openside

operate

operating (operational) control procedure

operating ground equipment

operating steam pressure

operation

operation and maintenance

operational

operational test and evaluation

operational weather support

operator table

opportunity

opposite

opposite commutator end

opposite pulley end

optical

optical axis

optical character recognition

optical detection and ranging

optimum

optimum working fequency

optional

optional (altn abbr)

orange

orange

orange (altn abbr)

orange indicating light

orbital determination module

orbiting astronomical observatory

orbiting geophysical observatory

orbiting vehicle

order

ordinary

ordinance

organic

organization

orientation

oriffice

origin

original

original equipment manufacturer

ornament

oscillate

oscillating

oscillator

oscillogram

oscillograph

oscillograph, string

oscilloscope

otherwise specified

otherwsie specified

ounce

ounce 記号

ounce-inch

ounce-inch 記号

out to out

outboard

outer

outer marker

outer wing

outerback end

outfit

outgoing

outgoing repeater

outgoing trunk

outlet

outlet gas temperature

output

output register

output shift register

outside

outside circumference

outside diameter

outside diameter tube

outside face

outside helix angle

outside mold line

outside of metal

outside radius

outside screw and yoke

outside trim template

outstanding leg

oval haed

oval point

over

over, short and damage

over-all

overall

overarm

overboard

overcast

overcurrent

overcurrent relay

overflow

overfrequency relay

overhanging

overhaul

overhaul and repair

overhead

overload gross weight

overload relay

overpower

overpressurized

override

override control bits

overrun

oversize

overspeed

overtone

overtravel

overvoltage

own doppler nullifier

oxide

oxidized

oxygen

oxygen breathing apparatus

ozalid print