Automobile owners only need fix one time, thereby can effectively guard against theft, the cost of the part is very low and can be mass produced. 车主只需安装一次,即可有效防盗,该部件成本非常低廉,并可以大批量生产。
Measurement of Very Low Vapor Pressures of Three Plasticizers by Mass Effusion Method 质量隙透法测定三种偏苯三酸酯的极低蒸汽压
They are very light, that is to say, low mass. 很轻,也就是说,质量很小。
When the dispersion was multimodel the particle size distribution generally was more wide, this condition was very favorable to obtain high solid content and low viscosity, especially when the mass fraction of larger particles in emulsion was about 80 %. 如果是多元分散,粒径分布一般较宽,非常有利于实现乳液低黏度下的高固含化,当乳液的大粒子质量分数在80%左右时最容易达到目的。
Because ion transport efficiency from electrospray ion source to the mass spectrometer is very low ( 0.01 % 0.1 % ), so the scientists are working to improve the mass spectrometry detection sensitivity. 由于从电喷雾离子源到质谱仪入口过程中离子的运输效率十分低(0.01%-0.1%),所以电喷雾过程中质谱仪检测的灵敏度一直是科学家们致力于提高的方面。