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Qingdao Tlead International Co., Ltd.
Shijiazhuang Zeyuan Optics Co., Ltd.
Nengshi Analytical Sensor Co., Ltd.
Shenzhen Xavier Precision Component Co., Ltd.
Yueqing Haixin Electronic Science Technology Co., Ltd.
Nanjing Co-Energy Optical Crystal Co., Ltd.
Liaoning Huake Petroleum Apparatus Science & Technology Co., Ltd.
Taizhou Runlab Labware Manufacturing Co., Ltd.
OPTECK MANUFACTURING GROUP LTD.
Weifang Mingliang Electronics Co., Ltd.
Guangzhou Yoki Machinery Import & Export Co., Ltd.
Beijing Topsky Century Holding Co., Ltd.
Yancheng Huisheng Medical Instrument Factory
Guangzhou Haike Outdoor Sport Co., Ltd.
Tianjin Humanda Technology Development Co., Ltd.
China Xinxing Shanghai Import & Export Corporation
Foshan City DaiNi Electronic Technology Co., Ltd.