English to French Tech/Engineering Electronics / Elect Eng In a patent: switchgear frame, voltage switchgear, joining element

The rear side—edge has a first trait 29, parallel to the front—side—edge 27, and a second trait 30 which is tilted with respect to the first trait 29. In particular, the second trait 30 is arranged parallel to the above mentioned common—plane P thus making possible to avoid a mechanical—interference with the profile—rod 6 and to enable mounting of the coupling—base part 4 thereon.

In order to insert the coupling—protrusion—means 15, 1 6, 17 in the respective openings 18, 1 9, 20, the coupling—base part 4 has to be initially tilted with respect to the longitudinal axis 11, as clearly shown in Figure 18 where the second trait 30 of the rear side edge is arranged parallel to the stepped surface 31.
Once the coupling—protrusion—means 15, 1 6, 17 have entered the respective openings 18, 19, 20 , the joining— 30 element 1 can be rotated clockwise thus arranging the first trait 29 of rear—side edge in a parallel position to the stepped—surface 31 and making the cut—out zones 25 and 26 of the locking—pins 15, 16 to firmly engage with the respective edge—zones of the securing—openings 18, 19.

**please find drawings in the link below in order to better figure the element called "trait"
https://register.epo.org/application?documentId=EXAWSDZV5337...