Structural diagram of telephone communication and clockwork.
Structural diagram of operational telephone communication.
Structural diagram of two-way loud-speaking communication, control-search communication and wire broadcasting.
Structural scheme of radio communication.
Structural diagram of the video registration system of operations personnel.
The format is DWG, compatible with AutoCAD 2004-2017, Compass, ZWCAD, nanoCAD, BricsCAD, etc.
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