国产一级黄片免费_无码不卡中文字幕aV_在线播放午夜无码毛片_国产一级AV免费观看在线_欧美大黑BBBBBBBBB香啊,亚洲国产精品成人综合_国产欧美精品一区二区三区_成人精品一区二区91毛片不卡_99久久精品无码一区二区毛片免费_一本色道久久综合精品免费 ,另类老妇性BBWBBW,四川少妇搡BBW搡BBBB,嫩BBB槡BBBB槡BBBB,四川少妇BBW搡BBBB槡BBBB,女BBBB槡BBBB槡BBBB ,亚洲第一精品精品无码久久_国产午夜激片Av毛片不卡_亚洲欧美日韩国模久久精品_欧美精品A一级区_亚洲精品久久久一区黄无码国产a一级无码毛片一区二区三区

One is blind expansion, leading to overcapacity. At present, not only in the fiber optic cable There is overcapacity problem, due to domestic manufacturers into the upstream optical fiber prefabricated rod industry, overcapacity problems are likely to spread to the prefabricated rod industry.

The anti-dumping investigation of Japanese and American optical fiber precast rod manufacturers, launched in March 2014, may accelerate the transfer of prefabricated rod production capacity from foreign-funded enterprises to China, and the overcapacity of the downstream optical fiber industry is likely to be replicated to the optical fiber prefabricated rod industry. Second, China's optical communication industry has a lack of core technology, the development capacity is not strong enough, this shortcoming in the optical device performance is particularly strong. China's carrier backbone network has begun to fully enter the era of 100G, the increase of transmission capacity with the reduction of transmission distance, the solution to this problem is to adopt lower loss of optical fiber.

For ultra-low loss fiber, its rod making process is completely different from the traditional optical fiber, China's optical fiber production enterprises in this field is still in the stage of technology research and development, with the Japanese and American enterprises between the existence of more than 2-3 years of Technology gap.