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Member units of International Metal Industry Alliance

Guangdong private science and technology enterprise accreditation certificate

Guangdong high tech product certificate

Application form for registration and publicity of Dongguan building energy saving materials and products (Tianshang)

Director unit of China Solar Energy Engineering Alliance

Power of attorney of China Solar Energy Engineering Alliance

Shanxi record 2019

Tianshang honorary certificate

Hot water engineering certificate

Patent of solar energy automatic water supply thermostatic system

Patent of solar energy automatic control system

Patent of solar air heat transfer water heater

Solar collector patent

Patent of solar heating hot water system

Patent for centralized heat collection and household heat storage solar hot water system

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