"Friction surfaces" refers to the areas or surfaces that come into contact with each other and create resistance or friction when they rub against each other. Full definition
On low friction surfaces, for instance, or accelerating hard out of a tricky corner as another example, this could be an unwanted trait. (motoring.com.au)
It also allows you to pull away smoothly and evenly, even on low ‑ friction surfaces such as ice, snow or wet grass. (landrover.in)
Little by little... The more friction surfaces you add the harder it gets to turn over, then once you add compression to the equation.. (mechanics.stackexchange.com)