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Shanghai Drawell Scientific Instrument Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
Labmen Instrument Limited
Nanjing Kejie Analytical Instrument Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Nanjing T-Bota Scietech Instruments & Equipment Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.