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