1592953258000 1312632483000 term-41150 1616541513957 1312632534000 1616290472696 adlib fitz-online adlib-term-41150 d4d0ff49-ea86-30e1-ba75-29a14cb51a41 2 1 communication systems (infrastructural systems) communication systems (infrastructural systems) term reference term-41289 adlib-term-41289 81b4ed36-102e-365a-ab9b-306b74608345 telecommunication systems