Последние добавленные видео:
橡膠
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3 years ago
24258 3 years ago 2:35纪录片：橡胶树的汁液是如何加工成橡胶的
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1 year ago
41985 1 year ago 10:46The process of mass producing rubber parts. Japanese factory producing 100,000 rubbers per day.
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1 year ago
5738189 1 year ago 18:02How Natural Rubber Latex is Extracted From Millions of Hevea Trees
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5 years ago
4376 5 years ago 6:19繼茂橡膠(GMORS) 公司簡介片