off
off-design
offence
off-highway
off-load
off-road
offset
off-side
off-the-road
OHV
  oil
oil-bath
oil-cooled
oil-depth
oiler
oil-in
oiliness
oilite
oil-level
oil-out
oil-pan

    oil pressure indicator

     датчик давления масла

     масляный манометр