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