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Beijing Topsky Century Holding Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Dongguan Haida Equipment Co., Ltd.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Shanghai Boqu Instrument Co., Ltd.
Shenzhen Lite Technology Limited
Huazheng Electric Manufacturing (Baoding) Co., Ltd.