Before the system running and after one year , the cleanliness measured by airborne particles and settling microbe were both 7 grade according to gb50073 - 2001 and gb / t 16294 - 1996 该组培室正式运转前和运转一年后，室内的悬浮粒子和沉降菌指标均达到洁净度国家标准7级。
“ they are transmitted through the nose and respiratory passages , by touch , and by contact with airborne particles that are created by sneezing or coughing , ” says dr jain 杰恩博士说： “鼻病毒主要通过触摸以及打喷嚏或咳嗽产生的空气飞沫传播，经由鼻腔和呼吸道进入体内。 ”
Standard practice for continuous sizing and counting of airborne particles in dust - controlled areas and clean rooms using instruments capable of detecting single sub - micrometre and larger particles 使用能检测单个亚测微计及较大粒子的仪器在控制尘埃区域及无菌区中连续测定空气中悬浮粒子的大小及计数
In 2001 , beijing had 34 days where measures for fine particulate , airborne particles of 10 micrometers or less ( pm10 ) , were near the blue sky boundary , and approximately half were reported as blue sky days 2001年，北京可吸入颗粒物和大气粉尘指标有34天位于“蓝天”标准附近，其中约有一半被定为了“蓝天” 。
Puts forwards performance index of airborne particle counter and test principle and test methods ? based on referencing foreign standard of methods for testing the performance of airborne particle counter and current development in china ? and introducing standard draft 在参考国外尘埃粒子计数器的性能试验方法标准的基础上,根据我国的实际情况,提出尘埃粒子计数器性能指标和相应的实验原理及方法,介绍国家标准草案。
