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Shenzhen Handsome Technology Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Shenzhen Security Electronic Equipment Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Qingdao Tlead International Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Wincom Company Ltd.
Changzhou Andwin International Corporation Limited
Xi'an Heb Biotechnology Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.