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OPTECK MANUFACTURING GROUP LTD.
Nanjing Kejie Analytical Instrument Co., Ltd.
Ergas Technology Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Nanjing Poweam Medical Co., Ltd.
Canfort Laboratory and Education Supplies Co., Ltd.
Shenzhen Xavier Precision Component Co., Ltd.
Wuhan Joho Technology Co., Ltd.
Jinjiang Jiaxing Group Co., Ltd.
CPG OPTICS LIMITED
Guangzhou Haike Outdoor Sport Co., Ltd.
VY Optoelectronics Co., Ltd.