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