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Shijiazhuang Zeyuan Optics Co., Ltd.
GIAI PHOTONICS CO., LTD.
Guangzhou Haike Outdoor Sport Co., Ltd.
Shenzhen Dowdon Tech Co., Ltd.
Foshan Sident Technology Limited
Shenzhen Xavier Precision Component Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Canfort Laboratory and Education Supplies Co., Ltd.
Jinjiang Jiaxing Group Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.