air back valve是什么意思

网络释义

用法例句

The Disturbing Analysis of the Chlorin Ion from the Sampling Case to the Concentration of HCl in the Air;

采样容器溶出氯离子对监测空气中氯化氢的干扰分析

Determination of Volatile Organic Compounds in Environmental Air by Cryo-concentration/GCMS;

预冷冻浓缩系统与气相色谱-质谱联用测定空气中挥发性有机物

Determination of Total Mercury in Air by Atomic Fluorescence Spectrometry;

原子荧光光度法测定空气中的汞

Organic vapor pollutants were monitored in the atmosphere of Changchun city from September, 1997 to July, 1998.

从1997年9月～1998年7月对长春市空气中气相有机烃污染物进行布点监测。

Content of pollutant bacteria and mold in our campus atmosphere was tested using sedimentation plate method and with beef and Czapek s media in summer and winter respectively.

采用沉降平板法 ,选用牛肉膏培养基与察贝克培养基 (czpekmedium) ,分别在夏季与冬季检测了校园不同环境中空气污染细菌与霉菌的含量。

Determination of 3 kinds of aldehydes in ambient air by Capillary Gas Chromatography;

毛细管气相色谱法测定空气中三种醛类污染物

The indirect determining method of phosgene in ambient air by reversed-phase high performance liquid chromatography was set up.

,10 μm )为分析柱 ,甲醇 -水 (体积比为 70∶30 )为流动相 ,在 2 5 7nm波长处用紫外检测器检测 1,3 二苯基脲 ,建立了间接测定空气中光气的反相高效液相色谱法。

An HVS-1000 high\|volume sampler was modified and the sampling efficiency enhanced,by adding a cartridge filled with XAD-2 and PUF under the filter to collect PAHs in the gas phase as well as in particle of ambient air.

改装了HVS-1000型大流量采样器,实际工作中用滤膜"XAD-2加PUF"同时采集空气颗粒物和气相中的PAHs,有效地提高了采样效率,并初步定量评价了PAHs在颗粒物和气相中的分配;用添加替代物的方法评价了预处理过程的回收率;用乙腈和水梯度洗脱、PAHs专用色谱柱分离、紫外检测的方法对USEPA规定的16种PAHs类优先污染物进行了定性和定量分析。

This paper fully sums up research of heat pump in Harbin Institate of Technogy in China from 1960 sto 2003, including development and research of heat pump equipments, research of air/air heat pumps air-conditioner,forecast analysis and evaluation of water-loop heat pump systems and heat pump stations in china, air source heat pumpwater chiller/heater and ground source heat pumps etc.

系统地总结了哈尔滨工业大学从20世纪60年代到2003年期间在热泵方面的研究工作,包括热泵设备的开发与研究、空气/空气热泵空调器的研究、水环热泵空调系统在我国应用的预测分析与评价、大型热泵站在我国应用的预测分析、空气源热泵冷热水机组和土壤源热泵等,展示了哈工大热泵科研工作的概况和取得的成果。