1) vacuum core
真空采样器
3) pre-vacuum sampling
预抽真空采样
1.
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。
5) air sampler
空气采样器;空气取样器
6) PM10 air sampler
PM10空气采样器
1.
The cutpoint principle of PM10 air sampler is analyzed and the tracks of particles are studied by numerical computing under the different flow, nozzle dimension and distance between nozzle and impact board.
分析了PM10空气采样器的切割原理 ,并利用数值计算研究颗粒在不同的流量、喷嘴尺寸及喷嘴与冲击板的距离下的运动轨迹 ,从而得到切割头设计参数对切割粒径的影
补充资料：保真
1.保全纯真的本性﹑天性。 2.保持原样，使不失真。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条