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Changzhou Andwin International Corporation Limited
Beijing Topsky Century Holding Co., Ltd.
Qingdao Tlead International Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Shenzhen Lite Technology Limited
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Zhuhai City Deyuan Import & Export Co., Ltd.