Coaxial cable, recognition symbol; coaxial transmission path; radio-frequency cable -  Application: coaxial structure not maintained on the right.
If the coaxial structure is not maintained, the tangential line shall be drawn only on the coaxial side.
Derived from this file.
(in English) (1993)  315-1975 - IEEE Standard American National Standard Canadian Standard Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters), IEEE, p. 44  DOI:  10.1109/IEEESTD.1993.93397. ISBN:  0738109479.
Michel Bakni