http://pastport.jp/user/chinaotr ja-JP Duratech is a tire solution provider for construction, surface mining, underground mining, quarries and port. Based on 20 years' expertise on OTR technology. 2021-11-18T11:35:59+0900 http://pastport.jp/user/chinaotr/timeline/chinaotr chinaotr http://pastport.jp/user/chinaotr/timeline/chinaotr