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https://hanzama.x0.to/2020/09/13/nishimatsu-construction-will-build-a-wi-fi-environment-on-67-hectares-of-mega-solar-construction-and-24-hours-of-field-management-built/
西松建設が67haのメガソーラー建設地にWi-Fi環境を構築、24時間の現場管理を実現(BUILT)