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Shenzhen Handsome Technology Co., Ltd.
WANT Balance Instrument Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.