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Qingdao Tlead International Co., Ltd.
WANT Balance Instrument Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Xi'an Heb Biotechnology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.