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Shanghai Boqu Instrument Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Jinan Enying Machinery Co.,Ltd
Beijing Topsky Century Holding Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
HV Hipot Electric Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.