engineer maintenance telecommunication tower doing ordinary and control antenna for communication |
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| navigate by keyword : communication transmission building radio telephone electronic drone metallic satellite global frequency panel electricity system micro mobile cell wifi skyline industrial link information receive cyberspace city environment internet climbing microwave smartphone closeup high infrastructure aerial radiation frame energy structure round |
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| Engineer maintenance on telecommunication tower doing ordinary maintenance and control to antenna for communication, 3G, 4G and 5G cellular |
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