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OPTECK MANUFACTURING GROUP LTD.
GIAI PHOTONICS CO., LTD.
Wuhan Joho Technology Co., Ltd.
Yiwu Wisdom Import & Export Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Shenzhen Xavier Precision Component Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
China Xinxing Shanghai Import & Export Corporation
Shenzhen Chuangxin Instruments CO., LTD.
Qinhuangdao Intrinsic Crystal Technology Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Foshan Sident Technology Limited
Shanghai Aucy Scientific Instrument Co., Ltd.
Ergas Technology Co., Ltd.