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Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.
Beijing ZhongRuiZhiCheng Technology Co., Ltd.
Zhongshan Sani Measuring Instruments Co., Ltd.
Shanghai AEAD Technology Co., Ltd.
Wenzhou Luosimeng Machinery Co., Ltd.
Qingdao Hiwits Meter Co., Ltd.
Zhejiang Holley Liyuan Metering Co., Ltd.
Labmen Instrument Limited
Ningbo Huashun Instrument Co., Ltd.
Xiuyan Precision Instrument Factory