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ANHUI WNK ELECTRONIC ENGINEERING CO., LTD.
Beijing ZhongRuiZhiCheng Technology Co., Ltd.
Shenzhen Sunyuan Technology Co., Ltd.
Xiuyan Precision Instrument Factory
Hebei Xukang Meter Manufacturing Co., Ltd.
Shanghai Cixi Instrument Co., Ltd.
Yueqing Haixin Electronic Science Technology Co., Ltd.
Xi'an Tosilon Automation Co., Ltd.
Xuzhou Ouke Instrument Co., Ltd.