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Tianjin Grewin Technology Co., Ltd.
Beijing GFUVE Electronics Co., Ltd.
Anyi Instrument Co., Ltd.
Nanjing Kehua Instrument & Meter Co., Ltd.
Ningbo Shunjay Instruments Co., Ltd.
Yi Wu Lv Yun Co., Ltd.
Shenzhen Slinya Electronic Co., Ltd.
SHANGHAI JIABEI INSTRUMENTS CO., LTD.
Hunan Puqi Geologic Exploration Equipment Institute (Common Partnership)
Wincom Company Ltd.
Shenzhen Sunyuan Technology Co., Ltd.
Xiamen Goldenbridge Imp. & Exp. Co., Ltd.
Shanghai Boqu Instrument Co., Ltd.