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OPTECK MANUFACTURING GROUP LTD.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Weifang Baite Magnet Technology Co., Ltd.
Hanzhong Quan Yuan Electronic Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Beijing Kiers Science & Technology Co., Ltd.
Yancheng Huisheng Medical Instrument Factory
Huanghua Faithful Instrument Co., Ltd.
Weifang Newheek OPT Machine Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Chongqing Clipper Industry Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Changzhou Andwin International Corporation Limited
Junhong Electronic & Technology Co., Ltd.
Wincom Company Ltd.
Shenzhen Handsome Technology Co., Ltd.
Tianjin Humanda Technology Development Co., Ltd.
Qingdao Carong Import & Export Co., Ltd.