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Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Zhuhai City Deyuan Import & Export Co., Ltd.
WANT Balance Instrument Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.
TRYTE TECHNOLOGY (HUNAN) DEVELOPMENT CO., LTD.
Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
Qingdao Tlead International Co., Ltd.
Jinan Handa Electron Technology Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Wincom Company Ltd.
Dongguan Haida Equipment Co., Ltd.
Shenzhen Handsome Technology Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Shandong Dongrun Instrument Science and Technology Co., Ltd.