الاهتزازية مطحنة الربيع تصاعد للبيع آلات
Eco Technology - Epson and the Environment - Epson. Release of a Simple Tool for Measuring PFCs. Perfluorocarbons and some other gases used in semiconductor and LCD fabrication have extremely high global warming potential–a level that is about 10,000 times greater than that of CO 2.But measuring PFC gases was difficult until 2000, when Epson independently developed a simple method for ...