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Shanghai Cixi Instrument Co., Ltd.
Yueqing Haixin Electronic Science Technology Co., Ltd.
ANHUI WNK ELECTRONIC ENGINEERING CO., LTD.
Xiuyan Precision Instrument Factory
Xi'an Tosilon Automation Co., Ltd.
Beijing ZhongRuiZhiCheng Technology Co., Ltd.
Shenzhen Sunyuan Technology Co., Ltd.
Toylongsun Company Limited