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Jul 14, 2026 · seen Sep 30, 2026
Class 3 Refrigeration Exam JP is a business app by razuma with 100+ downloads (about 161 estimated). +20 installs in the last 7 days. Released Jun 18, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “A study app for the Japan Class 3 Refrigeration Machinery Responsible Engineer (第三種冷凍機械責任者) exam. Study efficiently with practice questions and detailed explanations across all subjects. ■ Subjects Covered • Refrigeration Principles and Refrigerants • Refrigeration Equipment (Compressor / Condenser / Evaporator /…”