pressure vacuum vent

pressure vacuum vent pressure relief vent,pressure relief 英语翻译Vacuum/Pressure Retention是一种检漏方法,测量包装顶空真空或压力的,正确的中文翻译是什么?原文8.15 Vacuum/Pressure RetentionDescription:Vacuum/pressure retention tests consist of directly measuring the vacuum or vent flange pressure pressure pressure? pressure vacuum 是 vacuum是什么意思 vent dans les vent什么意思啊 山雨欲来 VENT MAUVAIS怎么样 vent ventilation是什么意思 hydrothermal vent是什么意思 Le vent armoire pour 英语翻译Early in the century,a pump hadcome into use in which expanding steam raised a piston in a cylinder,andatmospheric pressure brought it down again when the steam condensed inside thecylinder to form a vacuum． 英语翻译In each experiment,special attention was given to themeasurement of drying curve.Variations of ambient temperatureand vacuum pressure during drying were also recorded.Figure 4 shows the drying curves for conventional freezedrying and diel