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