Coaxial Cable 3 : A transmission line in which one con?ductor completely surrounds the other, the two being coaxial and separated by a continuous solid dielectric or by dielectric spacers. NFPA 1221, 2002 ed
National Fire Protection Association, Illustrated Dictionary of Fire Service Terms, Jones & Bartlett Publishers, MA. USA 2006. https://books.google.com.kw/books?id=W0WIRa3Gl4QC& printsec=frontcover&source=gbs_ge_summary_r&cad=0# v=onepage&q&f=false, (Fr Srvc - Amer) {141}