人人精品久久_亚洲视频网站在线_亚洲国产爱_久久91亚洲_日韩av一区二区三区在线观看_国a精品视频大全

					Customer issues within 24 hours to answer, e-mail reply within 24 hours, customer complaints processed within 48 hours, working hard, timely, accurate, warm service.

					Sapphire unique nature determine its widely used, but high-quality sapphire is difficult to get. As we know, sapphire seed crystal growth has a direct impact, but have become a key factor to grow high quality crystals

					Sapphire surface defects and dislocations seriously affect the quality of crystal growth of subsequent epitaxial layers, thus affecting the LED luminous efficiency and lifetime.

					PL detection system can monitor all processes in the solar cell manufacturing and gives accurate analysis possibility to the technology problems.