切线tangent【数】;tangent line【数】;tangential line【数】
切线面分裂tangential division;tangintial longitudinal division
切面曲率tangential curvature【数】
切线的tangential
切映象tangential map【数】
切向速度tangential speed
下颌升支切线位投照术tangential position roentgenography of mandibular ramus
切线伤tangential wound