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Hangzhou Gongheng Weighing Equipment Co., Ltd.
Beijing Broad Laser Science & Technology Co., Ltd.
Wuhan Joho Technology Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Suzhou Industrial Park Winwin Import & Export Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Shanghai Drawell Scientific Instrument Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
SHANGHAI JIABEI INSTRUMENTS CO., LTD.
Tianjin Humanda Technology Development Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Ningbo Hongbo Optical Instrument Co., Ltd.
Lianyungang Hongkang Quartz Products Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Jiangsu Tianyuan Experiment Equipment Co., Ltd.
Qingdao Carong Import & Export Co., Ltd.
Labmen Instrument Limited
Guangzhou Dimei Beauty Technology Co., Ltd.
Wuxi Srowav Machinery Co.,Ltd
Nengshi Analytical Sensor Co., Ltd.