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Beijing Topsky Century Holding Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Huanghua Faithful Instrument Co., Ltd.
Shanghai RuiBiao Construction Machinery Co., Ltd.
Donghai Yukang Quartz Material Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
Guangzhou Chinloo Biotechnology Co., Ltd.
Guangzhou Haike Outdoor Sport Co., Ltd.
Yancheng Huisheng Medical Instrument Factory
Ningbo Hongbo Optical Instrument Co., Ltd.
Movel Scientific Instrument Co., Ltd.
UPWARD TECHNOLOGY CO., LTD.
Suzhou Speed Imp.& Exp. Co., Ltd.
Junhong Electronic & Technology Co., Ltd.
Ergas Technology Co., Ltd.
Tianjin Humanda Technology Development Co., Ltd.