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Shanghai Drawell Scientific Instrument Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Wincom Company Ltd.
Labmen Instrument Limited
Xi'an Heb Biotechnology Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Jinan Unistar Machinery Co.,Ltd
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Qingdao Tlead International Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.