Hangzhou RAY Optoelectronic Equipment Co., Ltd As a CATV fiber optical equipments manufacturer, we demonstrate our professional in the past 15 years. We insist on R&D therefore our products keep developing to high performance and high stability. We succeed in various projects of CATV optical transmission, because of our good quality products, professional solutions and excellent after-sale service. We has become the big supplier to many provinces in China, our annual sales is about RMB80 ...