标准摘要
[中文适用范围]： 指定三种方法： 方法 A - 密度梯度柱法，无需预处理加热和冷却循环； B法——排水量和重量变化测定法；方法 C - 具有预处理加热和冷却循环的密度梯度柱方法。 [外文原描述]： Specifies three methods: Method A - density gradient column method without a preconditioning heating and cooling cycle; method B - displacement of water and determination of change of weight method; method C - density gradient column method with a preconditioning heating and cooling cycle.
英文名称Polytetrafluoroethylene (PTFE) tubing for aerospace applications — Methods for the determination of the density and relative density