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Changzhou Operson Imp. and Exp. Co., Ltd.
Taizhou Runlab Labware Manufacturing Co., Ltd.
Donghai Yukang Quartz Material Co., Ltd.
Movel Scientific Instrument Co., Ltd.
Tianjin Humanda Technology Development Co., Ltd.
Lianyungang Hongkang Quartz Products Co., Ltd.
Yancheng Huisheng Medical Instrument Factory
Zhejiang Aijiren Technology, Inc.
Qingdao Carong Import & Export Co., Ltd.