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