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Beijing Topsky Century Holding Co., Ltd.
Wincom Company Ltd.
Labmen Instrument Limited
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Jinan Zhongke CNC Equipment Co.,Ltd
Qingdao Tlead International Co., Ltd.
WANT Balance Instrument Co., Ltd.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.
Xi'an Heb Biotechnology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.