背: body's back背锥: back cone ; normal cone; normal cone锥面: cone; conical surface; pyramidal face; tapered face ring背锥齿: gauge compact背锥角: back angle; back cone angle背锥距: back cone distance背锥齿廓: back cone tooth profile背锥近似法: tredgold‘s a roximation; tredgold’s approximation背锥距离: back cone distance背锥母线: back cone element背锥疣孢属: anapiculatisporites棱锥面: pyramid surface; pyramidal plane前锥面: front cone体锥面: body cone外锥面: male cone圆锥面: circular conical surface; cone; conical surface锥面波: conical wave锥面环: taper-face ring准锥面: cone director; director cone蓝背锥嘴森莺: blue-backed conebill【数学】配极锥面。: reciprocal cone标准锥面: normal cone齿根圆锥面: root cone单形锥面: cone of a simplex等边锥面: equilateral cone