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The urea easy to absorb moisture, when in the air relative humidity is bigger than the urea moisture absorption, it on absorption air in moisture content, but deliquescence.

尿素容易吸濕，當(dāng)空氣中的相對(duì)濕度大于尿素的吸濕點(diǎn)時(shí)欧美巨屌黄色视频，它就吸收空氣中的水分而潮解欧美性爱视频在线观看国产日本欧美亚洲日韩。

The pollutant in the air on elevated road was analyzed. The relation between vehicle density and pollutant concentration in the air was studied.

并對(duì)高架道路上的空氣污染物進(jìn)行分析，研究了車(chē)輛密度與流量亚洲精品456在线观看，車(chē)速和污染物之間的關(guān)系99久久国产热无码精品。

The invention is capable of increasing the air pressure in the air inlet manifold and improving the aeration coefficient in the cylinder while in instantaneous acceleration, thereby changing the combustion conditions of the internal combustion engine at a medium and low speed, resolving the problem of the poor accelerating performance of the turbocharger at the medium and low speed, improving the output torque at the medium and low speed, optimizing the accelerating performance and greatly shortening the acceleration response time of the automobile; moreover, because the fuel is fully burned, the utilization factor of the fuel is also improved and the discharge capacity of the internal combustion engine is reduced.

本發(fā)明能夠增加進(jìn)氣歧管內(nèi)的空氣壓力，提高加速瞬時(shí)缸內(nèi)的充氣系數(shù)2020免费a视频，從而改變內(nèi)燃機(jī)中低速的燃燒狀況国产乱视频，并改變渦輪增壓機(jī)中低速加速性能差的問(wèn)題，提高中低速的輸出扭矩在线国产一区，優(yōu)化加速性能A级毛片全部永久免费观看，使車(chē)輛的加速響應(yīng)時(shí)間大大減短；同時(shí)久久精品视频只有精品，由于燃料獲得了充分燃燒国产又黄又硬又湿又黄又喷水，也提高了燃料的利用率，降低了內(nèi)燃機(jī)的排放量欧美精品在,欧美一区二区。

Spanish scientists have detected the presence of cocaine in the air of Madrid and Barcelona by using a new technique, AFP reported. The scientists found at least 5 different types of illegal drugs in the air: cocaine, amphetamines, opiates, cannabinoids and lysergic acid.

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Commonly,office with air-condition lacks of natural airiness,people breathe out CO2,the fog that is coursed by smoking,some office equipment.These things emante maleficence to bulk in the office.There are wet resorting in the air-condition system,this becomes the "dirt-hiding place".Computers,displays,hand-holding telephone and other electric equipments can produce certain amount of ionization radialization.Some building materials also release certain injurant.

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The method meets the requirements of Regulation of Studies on the Determination of Toxicants in the Air of Workplace. It is suitable to determine the mesityl oxide in the air of workplace.

本方法各項(xiàng)指標(biāo)達(dá)到《工作場(chǎng)所空氣中有毒物質(zhì)檢測(cè)方法研制規(guī)范》要求，適用于工作場(chǎng)所空氣中異亞丙基丙酮的測(cè)定国产精品福利在线观看入口。

The method is meet the requirements of Regulation of Studies on the Determination of Toxicants in the Air of Workplace.It is suitable to determine the mesityl oxide in the air of workplace.

本方法各項(xiàng)指標(biāo)達(dá)到《工作場(chǎng)所空氣中有毒物質(zhì)檢測(cè)方法研制規(guī)范》要求亚洲中文字幕第一页精品，適用于工作場(chǎng)所空氣中異亞丙基丙酮的測(cè)定。

Methods: Mesityl oxide in the air was sampled by active carbon tube and desorbed by the solvent of carbon disulfide which included 1% methanol, then separated by FFAP capillary column, and finally detected by hydrogen flame detector. The experimental study was conducted according to the requirements of Regulation of studies on the determination of toxicants in the air of workplace.

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Results: The good linear range of method was 10 to 1000μg/ml (T=0.9999) with the correlation coeffivient of 0.9999, and the limit concentration in air was 0.2 mg/m^3 with the average relative standard deviation less than 5%(n=6). The average sampling rate ranged from 96.6 to 100%, and the breakthrough capacity of l00mg activated charcoal was 4.7mg. The average desorption rate was 97.6%, and mesityl oxide absorped in activated charcoal tube was stable for 7 days and can be detected accurately with other gas coexisting in the air of workplace.

結(jié)果：異亞丙基丙酮濃度在10~1000μg/ml內(nèi)呈良好線性關(guān)系，相關(guān)系數(shù)0.9999欧美一级A片全视频，最低檢出濃度為0.2mg/立方公尺国产一区清纯美女在线观看，相對(duì)標(biāo)準(zhǔn)偏差＜5%(n=6)；氣體采樣效率≥96.6%摸女生下体高潮喷水视频，100mg活性炭對(duì)異亞丙基丙酮的穿透容量為4.7mg，平均解吸效率97.6%最新亚洲日韩中文字幕在线播放一区二区；活性炭樣品室溫下可保存7天一级a作爰片A级毛片；丙酮、丁酮乱子国产刺激、異佛爾酮无码欧XXXX在线观看、苯、甲苯直接在线观看黄色视频主页、二甲苯等共存物不干擾測(cè)定日韩欧美A片一级久久72。