Remote Sensing Measure of Crop Area Based on Spatial Sampling
基于空间抽样的农作物面积遥感测量
automatic sequential air sampler
自动连续空气抽样器
wet system of evacuating
（用喷水空气泵抽空的装置）湿体系抽空
The air is evacuated from the furnace.
从真空炉中抽出空气。
Dehumidification: Removal of humifity from the air.
抽湿:把空气中的湿气抽除。
neon light tube vacuum pump
霓虹灯管真空抽气泵
steam-jet air ejector
蒸汽喷射式空气抽逐器
The air having been pumped out, the tube is reduced to a vacuum.
空气抽出后，管子已处于真空状态。
The vacuum pumps begin sucking the air from the barrel of gun.
真空泵开始抽取电子枪管里的空气。
exhaust pulse air injection
(抽吸式) 排气脉冲空气喷射
She gasped in wonderment at her good luck.
她运气这样好, 惊奇地倒抽了一口凉气.
sample collection bag for dilution air
稀释空气样气收集袋
Spatial Pattern and Sampling Technique of Overwintering Adult Citrus Rust Mite (Phyllocoptes obleivortts Ashmead)
越冬柑桔锈螨的空间格局与抽样技术
A Study of the Spatial Distribution Pattern of Eteoneus Angulatus Drake et Maa and of lts Sampling Method
角菱背网蝽空间格局及抽样技术研究
Remote Sensing Measure of Crop Area Based on Spatial Sampling
基于空间抽样的农作物面积遥感测量
Pattern of spatial distribution and sampling technique of winter jujube black spot
冬枣黑斑病空间格局及抽样技术研究
water ejector pump
喷水抽气泵(一种机械真空泵)
The pump sucks air out through this valve.
这台泵通过这个阀门把空气抽出.
When all air has been removed, the vessel is sealed off.
把全部空气抽走后，将容器密封起来。