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Qingdao Tlead International Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Wincom Company Ltd.
Jinan Handa Electron Technology Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.