vacuum-tube characteristic 真空管特性
characteristic of vacuum valves 真空阀门的特性
vacuum tube characteristic 真空管特性
vacuum drying characteristic 真空干燥特性
A method of using vacuum characteristic of a nozzle to reuse the oil mist generated during machining operation was put forward.
分析和测试了喷嘴的真空特性，设计了一套基于喷嘴油雾回收系统。
Firstly, analyse the basic principle and process characteristic of Vacuum Freecing-dry.
分析了真空冷冻干燥基本原理与过程特点。
Compared to atmospheric pressure hot water boiler, operational principle and characteristic of vacuum hot water boiler are narrated.
叙述了真空热水锅炉的工作原理、特点以及与常压热水锅炉的性能比较。
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