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https://hanzama.x0.to/2020/07/15/the-company-has-a-10-square-minute-wi-fi-in-its-factory-site-for-the-companys-1-million-square-square-year/
大阪ガスが工場敷地100万平米にプライベートLTE、導入費用「Wi-Fiの10分の1」(日経BP)