How will the LED lamp board be replaced, cradle-to-cradle regards to replacing individual LEDs, whole board, or throw away fixture after component failure?
怎样更换LED识别灯盘；关于替换单个的LED要从摇篮到摇篮，或者在组件失效测试后将其扔掉。
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For example, Philips Design's 2011 Microbial Home is a cradle-to-cradle nutrient management system and includes a bio-digester for the anaerobic fermentation of food waste;