It is recycled rubber. Look at this

来源: Michelangelo 于 2013-01-29 15:59:36 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (63 bytes)
回答: 会不会不环保？ 由 itistrue 于 2013-01-29 15:45:12

http://www.jogoequipment.com/playground-safety-surfacing

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