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Shandong Dongrun Instrument Science and Technology Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Qingdao Tlead International Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Deson Electric Group Company Limited
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Wincom Company Ltd.
Q-Ying Plastic & Electronic (Shenzhen) Co., Ltd.