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Beijing Topmachines S&T Co., Ltd.
Tianjin Humanda Technology Development Co., Ltd.
Shanghai Drawell Scientific Instrument Co., Ltd.
Taizhou Runlab Labware Manufacturing Co., Ltd.
Labmen Instrument Limited
Hangzhou Gongheng Weighing Equipment Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Citotest Labware Manufacturing Co., Ltd.
Hanzhong Quan Yuan Electronic Co., Ltd.
Huanghua Faithful Instrument Co., Ltd.
Hunan Puqi Geologic Exploration Equipment Institute (Common Partnership)
Beijing Kiers Science & Technology Co., Ltd.
Quanzhou Wanggong Electronic Scale Co., Ltd.
Qidong Perfect Precise Tools Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Canfort Laboratory and Education Supplies Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.