The phrase "mainly concentrated around" is grammatically correct and can be used in written English.
It is typically used to describe a central focus or activity that is primarily located or occurring in a specific area. Example: The festival was mainly concentrated around the town square, with various food and craft vendors lining the streets.
Industry is mainly concentrated around the larger centres, such as Roermond, Sittard, Venlo, and Weert, and includes the manufacture of light metals, clothing, hosiery, and chemicals.
The maximum stresses are mainly concentrated around the hull haunches, and the stress distributions at the ship ultimate collapse are presented.
Significant periods in all the three wavelength bands are detected that are mainly concentrated around 500 s as a fundamental mode and its odd (167, 100, 71, 56, 46, 39, 33, 29, 26, 24 s) harmonics.
Integrated analysis of the data of the two parts showed that the influence of flywheel micro vibration on the camera is mainly concentrated around 60 80 Hz and 170 230 Hz, the largest angular displacement of the secondary mirror along the optical axis direction is 0.04″ and the maximum angular displacement vertical to optical axis is 0.032″.
Their studies were mainly concentrated around improving the electrical conductance/EM shielding.
Estimated peaks of the hours of work densities suggest that working opportunities are mainly concentrated around full-time jobs with 40 hours of work.
The block copolymer which acted as a good compatibilizer was mainly concentrated in the interfacial area around the silicone phase.
The block copolymer that acts as a good compatibilizer was mainly concentrated in an interfacial area around the silicone phase.
Haplogroups F and G were mainly concentrated in Southwest China.
Industry is mainly concentrated in Cáceres city, the provincial capital.
Dunkin' Donuts is mainly concentrated in the eastern United States.
