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Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Wincom Company Ltd.
Fuzhou DIT Industry & Trade Co., Ltd.
Ningbo Jinghai Machinery Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Qingdao Tlead International Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.