亚洲伦乱视频_久久99精品久久久久久野外_毛片久久久久久久_亚洲人成网亚洲欧洲无码久久_蜜桃麻豆视频_欧美黑人精品一区二区

					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.