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Shenzhen Dowdon Tech Co., Ltd.
Labmen Instrument Limited
Guangzhou Haike Outdoor Sport Co., Ltd.
Shenzhen Siyuan Digital Technology Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
VY Optoelectronics Co., Ltd.
Jinjiang Jiaxing Group Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Henan Forever Medical Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Canfort Laboratory and Education Supplies Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Wincom Company Ltd.
GIAI PHOTONICS CO., LTD.
Shanghai Aucy Scientific Instrument Co., Ltd.