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Beijing Topmachines S&T Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Hangzhou Dooren Technology Co., Ltd.
Canfort Laboratory and Education Supplies Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Wenzhou Success Group Co., Ltd.
Shenzhen Zhonganxie Technology Co., Ltd.
Guangzhou BTD Car Tools Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Hanzhong Quan Yuan Electronic Co., Ltd.
Tianjin Humanda Technology Development Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Guangzhou Sume Beauty Equipment Co., Ltd.
Xilong Scientific Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Qingdao Carong Import & Export Co., Ltd.
Zhongke-Lian Sheng (Shenzhen) Technology Co., Ltd.
Donghai Yukang Quartz Material Co., Ltd.