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