He picked off the burs that had stuck to his overcoat.
他摘下粘在外衣上的刺果.
《簡(jiǎn)明英漢詞典》
Methods: The root canalroot canal orifice burs and helical drilling bits were prepared in advance.
方法: 采用根管口臺(tái)階狀車針與螺旋型根管鉆組合起來擴(kuò)大根管.
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