back-counterbore

短语

词形变化

back-counterbores 复数 back-counterbores 三单 back-counterboring 现在分词 back-counterbored 过去式 back-counterbored 过去分词

释义与例句

n.
  1. 1.

    A counterbore that is so made.

    There's no second operation on these parts. The backside features are all back-counterbores and back-spotfaces.

v.
  1. 1.

    To counterbore from the backside of a workpiece by using a boring tool that passes through a through hole, deploys a cutting edge (or receives it by manual insertion from an operator), counterbores 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

    We won't need any second operation on these parts. We're going to back-counterbore and back-spotface all of these features on the backside.

词源

From back- + counterbore.

来源：wiktionary