91色综合,中文字幕乱码人妻二区三区,亚洲女与黑人做爰,久久99精品国产.久久久久

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.