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Shanghai Drawell Scientific Instrument Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Deson Electric Group Company Limited
Nanjing Kejie Analytical Instrument Co., Ltd.
Wincom Company Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Qingdao Tlead International Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Labmen Instrument Limited