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Shijiazhuang Zeyuan Optics Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Shanghai Aucy Scientific Instrument Co., Ltd.
Zhejiang Top Cloud-Agri Technology Co., Ltd.
Shenzhen Slinya Electronic Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
GIAI PHOTONICS CO., LTD.
Guangzhou Yihua Electronic Equipment Co., Ltd.
Shenzhen Dowdon Tech Co., Ltd.
Raylabel Instrument Co., Ltd.
Wincom Company Ltd.