Floor fan Stadler Form Otto
380×350 mm
https://stadlerform.ua/ru/ventilyatory/Ventilyator-Otto-Bamboo%20O-009E/ 

All objects in the scene are logically named and grouped and have
your Multi / sub-object material.
For Corona render it is recommended to install a version not lower than 1.5 since the glossiness of the materials is adjusted with PBR in mind.