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ANHUI WNK ELECTRONIC ENGINEERING CO., LTD.
Vigile Electronics Factory
Shenzhen Sunyuan Technology Co., Ltd.
Xi'an Tosilon Automation Co., Ltd.
Guangzhou Jusbe Electronic Technology Co., Ltd.
Hebei Xukang Meter Manufacturing Co., Ltd.
Beijing ZhongRuiZhiCheng Technology Co., Ltd.
Shanghai Cixi Instrument Co., Ltd.
Xiuyan Precision Instrument Factory