backbore

词形变化

backbores 复数 backbores backbored backbores 三单 backboring backboring 现在分词 backbored 过去式 backbored 过去分词

释义与例句

n.
  1. 1.

    The section between the throat and shank of the mouthpiece of a brass instrument.

    More conical backbores give a richer tone, while more cylindrical ones give a brighter, more projected tone.

v.
  1. 1.

    To modify (a weapon's barrel) so as to increase the bore diameter.

    及物 工程 政治 军事
  2. 2.

    To bore from the backside of a workpiece by using a boring tool that passes through one or more through holes, deploys a cutting edge (or receives it by manual insertion from an operator), bores a feature on the far side, retracts the cutting edge (or has it removed), and then retreats back through the hole (toward the tool's origin).

    工程

词源

From back + bore.

来源：wiktionary