99人妻精品日韩欧美一区二区,久久影音,国产精品视频一区二区三区无码 ,中文字幕人妻制服丝袜

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.