The phrase "are concentrated below" is correct and usable in written English.
It can be used to describe the location or arrangement of items or elements that are gathered or focused in a lower position or area.
Example: "The resources we need for the project are concentrated below the main deck of the ship."
Alternatives: "are gathered beneath" or "are focused below".
Chelsea has been the undisputed center of the art market for the last decade, and the young and the new are concentrated below 14th Street.
50% and 80% Spectral Rolloff How much of the frequencies are concentrated below a given threshold (50% and 80%).
Within the European Alps the highest impacts due to human activities are concentrated below the potential treeline, making these zones comparable to the potentially highly impacted surroundings of the European Alps.
In a comparison of the imprint mechanisms with a vertical imprint case, while high stress and strain regions are concentrated below the mold for vertical imprint, they also occur around the mold in the case of roller imprint.
Thus, for both the box and U-shaped girders, the medium- and high-frequency vibrations of each slab are concentrated below 200 Hz, with the frequency bin of maximum vibratory velocity level mainly centered at 31.5 80 Hz irrespective of train excitation.
In the No Dep recordings the values are concentrated below 0.1, whereas in the Dep recordings they are broadly distributed up to 0.7.
"Guantánamo" is perhaps the first bottomless comedy much of the humor, and a fair amount of the nakedness, is concentrated below the belt.
But the action is concentrated below the waist, and direct appeals to spectators are rare enough to seem outside the rules.
HAROLD & KUMAR ESCAPE FROM GUANTANAMO BAY This cinematic burlesque show, in which the baggy pants keep dropping and occasionally fall off altogether, is perhaps the first bottomless comedy — much of the humor, and a fair amount of the nakedness, is concentrated below the belt.
