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Tianjin Humanda Technology Development Co., Ltd.
Changzhou Operson Imp. and Exp. Co., Ltd.
CNBMIT Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
Hongkong Joint Stars Group Limited
Dongguan Haida Equipment Co., Ltd.
Beijing Topmachines S&T Co., Ltd.
Hangzhou Gongheng Weighing Equipment Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Sure Medical Supply & Equipment Co., Ltd.
Beijing Zohonice Beauty Equipment Co., Ltd.
Taizhou Runlab Labware Manufacturing Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Shenzhen Xavier Precision Component Co., Ltd.
Lianyungang Hongkang Quartz Products Co., Ltd.
Jinjiang Jiaxing Group Co., Ltd.
Donghai Yukang Quartz Material Co., Ltd.