English to Russian Tech/Engineering Electronics / Elect Eng

Как это перевести "красиво"? ... должны быть присоединены к кожухам через контактную поверхность большой площадью?

Shielding system
Shield bars

To avoid interferences, all metallic parts of the enclosure of modules and racks must be connected to the panel via a low resistance (large area) contact surface.

Adjacent panels must be screwed together via a large surface using normal serrated washers.
Panels should be welded or screwed to the foundation rails and connected via the ground conductors or equipotential bonding conductor rails.

The shield bars within the panels and subdistribution boards ***have to be connected to the enclosures via a large contact area*** (grounded).

On subdistribution boards made of plastic the shield bar has to be connected to the closest grounding point via an insulated equipotential grounding conductor (>= 6 sq.mm).

Shield bars have to be made of copper.