常见例句雙語例句OD to 15 mm below tooth root , ie tooth zone . No indication exceeding that equal to 3 mm flat bottom hole at the defect beam path distance.齒根下即齒區以下的外逕爲15毫米；在超聲波發射程距的缺陷処，3毫米的平底孔沒有顯示出來。www.jxcad.com.cn 返回 beam path distance