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Yueqing Haixin Electronic Science Technology Co., Ltd.
Hebei Xukang Meter Manufacturing Co., Ltd.
Shenzhen Sunyuan Technology Co., Ltd.
Beijing ZhongRuiZhiCheng Technology Co., Ltd.
Xi'an Tosilon Automation Co., Ltd.
Shenzhen Bonad Instrument Co., Ltd.
ANHUI WNK ELECTRONIC ENGINEERING CO., LTD.
Beijing GFUVE Electronics Co., Ltd.
Cheemi Technology Co., Ltd.