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Shijiazhuang Zeyuan Optics Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Jiaxing Yaou Optical Technology Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Shenzhen Bonad Instrument Co., Ltd.
VY Optoelectronics Co., Ltd.
Wuhan Joho Technology Co., Ltd.
Ergas Technology Co., Ltd.
GIAI PHOTONICS CO., LTD.
Qidong Perfect Precise Tools Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
China Xinxing Shanghai Import & Export Corporation
Guangzhou Haike Outdoor Sport Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.