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Fuzhou DIT Industry & Trade Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Labmen Instrument Limited
Nengshi Analytical Sensor Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
WANT Balance Instrument Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.