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Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Qingdao Tlead International Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Changzhou Andwin International Corporation Limited
Ningbo Jinghai Machinery Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Wincom Company Ltd.
Labmen Instrument Limited
WANT Balance Instrument Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.