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誰のためのモデルチェンジ?  Model change for whom?

省エネ大賞受賞技術開発の軌跡 (12)
第1章 もったいない無駄と必要な無駄
Trajectory of Energy Conservation Grand Prize-winning Technology Development (12)
Chapter 1 Wasteful Waste and Necessary Waste
1.2 Pitfalls of High Economic Growth and Technological Growth
1.2.2 Frequent model changes with less improvement