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TEDx Talks: 一根灯管的可持续设计 The sustainable design of a light tube | Liechao Cai | TEDxNingbo

2020-01-23 01:04:51 ·
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TEDx Talks: 一根灯管的可持续设计 The sustainable design of a light tube | Liechao Cai | TEDxNingbo

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