Customized Fiber Optic Attenuator Our Factory Nanjing HUAMAI Technology Co., Ltd. was founded in 1998.Over the past 20 years, HUAMAI has been dedicated in the field of optical communication field. And established solid industrial foundation.In 2017, HUAMAI was successfully listed on the Shanghai Stock Exchange. Today, the HUAMAI's marketing and service network has covered the world,Products and...