| 释义 |
〔riblet〕One of a series of microscopic grooves, each a few thousandths of an inch wide, inscribed on the surface of an adhesive-backed tape and used on airplanes and boat hulls to reduce drag.拉条：一系列细微的沟（或槽），每一个为千分之几英寸宽，刻在带背胶的胶带的表面，并用在飞机及船的彀上的以降低拉力〔millesimal〕Relating to thousandths.有关千分之几的〔ppt〕Parts per thousand.千分率，千分之… |