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Beijing Topsky Century Holding Co., Ltd.
Qingdao Tlead International Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.