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