1592953267000 1312632483000 term-41646 1616541530222 1312632534000 1616290497941 adlib fitz-online adlib-term-41646 db4549a8-1f42-3b8a-b81b-e603aff01f99 2 1 scope note Two-way direct communication systems for communicating within limited areas, such as office buildings or airplanes. W reference term-41645 adlib-term-41645 b6d2739c-b004-3596-88f7-e268c28ea033 intercom system V.PC.ALO.AFU.AFU.ALO.ARI 1 code V.PC.ALO.AFU.AFU.ALO.ARI 1 intercom systems reference term-41653 adlib-term-41653 0b3ea43c-0d4e-31f8-91ed-a7c40ff5cba2 sound systems intercom systems term