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Wenzhou Kangtuo International Trading Co., Ltd.
Dongguan Covna Automation Industry Co., Ltd.
Shanghai Yichen Valve Co., Ltd.
Wuhan Grat Control Valve Co., Ltd.
Yangzhou Hengchun Electronics Co., Ltd.
Wenzhou Heli Automatic Meter Co., Ltd.
VTORK Technology(Wuxi) Co., Ltd.
Dynamic Corporation Limited
Ningbo Yong Yuan Energy-Saving Technology Co., Ltd.