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