The development and application of chalcogenide glasses as an IR transmittingmaterial with high performance have long been impeded by insufficient degree of purity present in glasses.
高性能透红外硫系玻璃材料的开发和应用在很大程度上受到杂质对透过性能影响的制约。
2
The relation between sound velocity and syntonic frequency is gained by analyzing the ultrasound transmitting in thin material.
对薄型材料中超声波传播规律进行分析，得到材料声速与共振频率的关系。
3
Information work construction is to strengthen with effort the construction of material and information work, including collecting, storing and transmitting intelligence against organized crimes.