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Shenzhen Security Electronic Equipment Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Wuxi Longbo Roll Forming Machinery Co.,Ltd
Nanjing Kejie Analytical Instrument Co., Ltd.
Qingdao Tlead International Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
Deson Electric Group Company Limited