seven-level screwdriver

短语

词形变化

seven-level screwdrivers 复数 seven-level screwdrivers

别名

seven-level seven level screwdriver 7 level screwdriver

释义与例句

n.
  1. 1.

    A plastic-handled (officially yellow) pocket screwdriver (with clip) and a 2.5 inch shank, ending in a 1/8 inch slotted head.

词源

From seven-level + screwdriver, so called because Air Force "seven-level" personnel (advanced techs/higher ranks) typically carried this kind of screwdriver. It was rumored to be the ONLY tool these advanced techs ever needed, or were allowed to carry. Advanced techs only "do" small trim-pot tweaking. Less-experienced techs handle the heavier tools and tasks.

来源：wiktionary