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Shanghai Drawell Scientific Instrument Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Henan Forever Medical Co., Ltd.
Shenzhen Siyuan Digital Technology Co., Ltd.
Wuhan Joho Technology Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Ningbo Hongbo Optical Instrument Co., Ltd.
Nanjing Poweam Medical Co., Ltd.
GIAI PHOTONICS CO., LTD.
Nanjing Kejie Analytical Instrument Co., Ltd.
Guangzhou Maya Medical Equipment Co., Ltd.
Jiaxing Yaou Optical Technology Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Shenzhen Bonad Instrument Co., Ltd.