English to Russian Tech/Engineering Engineering (general)

Руководство к ammonia plant.


Detailed cleaning and passivation procedures prepared by the Specialist Chemical Cleaning Contractor should include:
A listing of the items of equipment and pipe work which will comprise that particular chemical cleaning and passivation circuit.
A ***highlighted set of the relevant P&ID’s, piping isometrics, and cleaning circuit schematic drawing on which is indicated the particular chemical cleaning circuit in question and also the:
...

Что здесь означает "highlighted"?

Спасибо.