空气

Excessive grinding or abrasion of this product may create airbome dust and fober concentrations in excess of state and Federal OSHA permissible exposure limits.if employee exposures exceed these PELs,local exhanst ventilation or other mechanical ventilation systems may be required to reduce such exposures to concentrations below the PELs.if mechanical exhaust ventilation is necessary,exhaust air should be appropriately filtered or otherwise controlled to meet local ,state and Federal air pollution and air quality laws and standards

磨削过度磨损或这种产品可能造成机载尘fober浓度超过州政府和联邦政府1921年允许暴露限定。如果雇员暴露超过这些研究生，局部排气通风或其他机械通风系统，可要求减少这种暴露浓度低于该PELs。如果机械排风是必要的，排风应适当过滤或以其他方式控制，以符合当地，州和联邦空气污染和空气质量法规和标准

A method of controlling air cleaner, which confirms exact percolator replacing time by using the weighted relative to the air pollution degree examined by the gas sensor.

一种控制空气净化器的方法，通过应用与气体传感器检测的空气污染程度相对应的加权确定精确的过滤器更换时间以确定过滤器更换时间。

Compared with PF6P, the attachment of alkyl or alkoxyl groups on phenylene effectively inhibits the formation of fluorenone-based excimers and thus remarkably improves the thermal stability of the spectra.3. Morphology and phase behavior of the polymers substituted with alkyl and alkoxyl groups on phenylene were investigated by differential scanning calorimetry, X-ray diffraction and other techniques.

一方面，未取代的PF6P薄膜和烷氧基取代苯的PF60C6薄膜在空气中退火后都产生了芴酮结构，随退火温度的升高所生成的芴酮结构的含量逐渐增大；另一方面，新的长波发射随退火温度的升高其荧光寿命明显增加，因此确定PF6P空气退火薄膜的长波发射是来源于芴酮的激基缔合物。

This article introduces the principle of photocatalysis and methods for application on air purification.

本文透过光触媒原理的介绍，希望读者了解光触媒的基本作用原理，并介绍光触媒在空气净化之应用方式及应用的实例，期读者对光触媒在空气净化之应用上，能有正确的观念。

Description: Photocatalyst air purifier at home and abroad in recent years is a more popular air purifier.

详细说明：光触媒空气净化器是近年来国内外比较流行的一种空气净化器。

From the studies of the methods of photoemission, capacitance and ultrasonic to detect the air in the transfusion pipe, the best way to detect the air is the use of ultrasonic.

通过比较光电式、电容式和超声波式三种对输液过程中空气的检测方法，可知超声波检测法为输液管内空气检测的理想方法。

Everyone knows that the temperature of the air is a physical quantity.It is easy to measure.The humidity of the air is also a very important physical quantity .

众所周知空气的温度是比较容易测量的物理量，而空气湿度则是一个非常重要的而又难以测量的物理量。

The pilot uses the propane burner to control how high or low the balloon flies. To go up, he or she turns up the burner to make the air in the envelope hotter. To go down, the pilot just lets the air cool down.

驾驶员会通过丙烷燃烧器来控制气球飞的高度，想要飞高时，他或她就会打开燃烧器加热气囊内的空气，若想要降低高度时，驾驶员只要让空气冷却下来即可。

Coal tar pitch and petroleum pitch were prepared from petroleum residues and coal tar by air blowing respectively.

分别以煤焦油为原料在300℃空气氧化120min～480min和以石油渣油为原料在220℃空气氧化300 min～720 min，制备了一系列具有相近软化点的煤焦油沥青和石油沥青。

This observation revealed that flowing air made an extra effect on air pressure in the plethysmograph. In the second experiment, the same volume of air was injected into the plethysmograph at different frequencies (0, 0.5, 1, 2, 3 Hz) and pressure changes inside were measured.

其次，往体积描记箱内注入相同容量、但通气频率不同的空气，结果显示，随着注入空气的频率增加，描记箱内压力变化幅度亦显著增加。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新