18无码粉嫩小泬无套在线观看,天天日天天搞韩国,黄色日b视频网站,日韩欧美操逼啊啊啊

XRF analyzers from Elvatech is a right choice for hundreds of applications. Elvatech Ltd. Company is an R&D enterprise based in Kiev, Ukraine. Since 1991 it has been engaged in scientific instrument-making specializing in design and manufacture of electronic, vacuum, and spectrometric equipment, automated data collection and processing systems, and analytical software. It's main products （XRF analyzer and metal analyzers） are used in industrial, research and academic laboratories worldwide.