"High loading" refers to a situation where there is a significant or heavy amount of something present or being used.
Sentences with «high loading»
It changes its six gears much faster than a skilled driver could — within a tenth of a second at high load and engine speed. (ausmotive.com)
The first thing you would notice during driving would be more sluggish performance under high load, but you may already notice the car being more difficult to start. (mechanics.stackexchange.com)
It's deep, with a slightly high loading lip, but it's well considered. (motoring.com.au)