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Nanjing Kehua Instrument & Meter Co., Ltd.
Shanghai Galaxy International Trade Co., Ltd.
Ningbo Shunjay Instruments Co., Ltd.
Nanjing Kejie Analytical Instrument Co., Ltd.
Jiangsu Tianyuan Experiment Equipment Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Shenzhen Sunyuan Technology Co., Ltd.
SICHUAN NEW TIANYUAN TECHNOLOGIES CO., LTD.