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