Joiwo Explosion-proof won the turnkey communication project in 2018 by supplying and installing dispatch systems, weatherproof emergency telephones and weatherproof junction boxes in Longdingshan tunnel along Harbin Expressway.
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Joiwo Explosion-proof won the turnkey communication project in 2018 by supplying and installing dispatch systems, weatherproof emergency telephones and weatherproof junction boxes in Longdingshan tunnel along Harbin Expressway.
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