美女特级毛片-美女特黄-美女视频永久黄网站免费观看国产-美女视频网站免费-美女视频网站黄色-美女视频免费看一区二区

Jiangsu Hongyang Quartz Products Co., Ltd. was established in Dec. 2004, is a collection of quartz materials research and development, production and sales in one of the science and technology-oriented enterprises. The main quartz products are: high purity quartz sand, quartz tubes, quartz rods, quartz plates, quartz diffusion tubes, quartz boats, quartz boat trays and other quartz devices. They are widely used in light source, photovoltaic, semiconductor, laser, aerospace and other fields. HongYang quartz focus on product development, with the advantages of integrated whole industry chain， industry-leading high quality products, and establish the long-term stable cooperative relationship with upstream and downstream leading enterprises.