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Shijiazhuang Zeyuan Optics Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Ergas Technology Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Shenzhen Siyuan Digital Technology Co., Ltd.
Nanjing Poweam Medical Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Shenzhen Haiwang Sensor Co., Ltd.
China Xinxing Shanghai Import & Export Corporation
Guangzhou Yihua Electronic Equipment Co., Ltd.
VY Optoelectronics Co., Ltd.
Shenzhen Bonad Instrument Co., Ltd.
Yiwu Wisdom Import & Export Co., Ltd.