标准摘要
[中文适用范围]： 本文件规定了基于仅测量超声脉冲飞行时间，使用接触技术或浸入技术确定金属和非金属材料厚度的原则。 [外文原描述]： This document specifies principles for determination of the thickness of metallic and non-metallic materials using the contact technique or immersion technique, based on measurement of the time of flight of ultrasonic pulses only.
英文名称Non-destructive testing — Ultrasonic thickness determination