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Qingdao Hiwits Meter Co., Ltd.
Dong Guan Dong Chen Electronics., Ltd.
Shenzhen Sunyuan Technology Co., Ltd.
Ningbo Yonggang Instrument Co., Ltd.
Ningbo Huashun Instrument Co., Ltd.
Zhejiang Holley Liyuan Metering Co., Ltd.
Shenzhen Calinmeter Co., Ltd.
Minsen Meter Co., Ltd.