pressure vacuum vent
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pressure vacuum vent
pressure vacuum vent
pressure vacuum vent
真空呼吸阀
pressure vacuum vent
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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
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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