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Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
WANT Balance Instrument Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Wincom Company Ltd.
Beijing Topsky Century Holding Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Hangzhou Lohand Biological Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.