Spring Swinging Hinge 125mm - Patina

Swing hinge, size 125 mm, designed for internal doors without rebates with a weight of up to 28 kg and a maximum width of 70 cm (for 2 hinges). The hinge operates bi-directionally, so the door in relation to the dimensions of the frame light should be made in such a way as to leave a gap of about 5 mm between the leaf and the frame, and a distance from the threshold or the ground of at least 10 mm.
The manufacturer recommends periodically lubricating the friction part with specialized products in spray.
How to install hinges for swinging doors?