pre-vacuum-pumping

This paper introduces the structure, the capability, the characteristic and the using effect in the textile equipment industry of the 60 kW previous deflating vacuum furnace.

详细叙述了 60kW预抽真空炉的结构、性能、特点及在纺织器材行业中的应用效果。

The results show that,in comparison with direct sampling,the pre-vacuum sampling can dramatically decrease gas sampling volume,shorten sampling time,and minish the difference of gas sample and the source,and thus improve sampling precision.

为了提高农田温室气体自动采样精度,该文比较了田间自动连续测定系统观测温室气体通量过程中实际管道直接采样与预抽真空采样的差异,结果表明:管道预抽真空采样能显著减少分析时的样品量,缩短采样时间和减小采集气样与源气样的差异,提高了采样的精度。