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Nengshi Analytical Sensor Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Dongguan Haida Equipment Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Hangzhou Lohand Biological Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.