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