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Zhuhai City Deyuan Import & Export Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Wincom Company Ltd.
Shanghai Boqu Instrument Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Huazheng Electric Manufacturing (Baoding) Co., Ltd.