"Purification Fan Box" German TUV Certification

Russian Union CUTR Certificate

EU Explosion-Proof ATEX Certificate

Purification filter fan box - utility model patent certificate

Purification filter fan box - utility model patent certificate

Identification certificate of explosion-proof direct centrifugal fan box

Identification certificate of direct centrifugal fire and smoke exhaust fan box

Appraisal certificate of energy-saving centrifugal fan

Appraisal certificate of low-noise energy-saving axial fan

Certificate of registration of scientific and technological achievements

Certificate of registration of scientific and technological achievements

Certificate of registration of scientific and technological achievements

Certificate of registration of scientific and technological achievements

Certificate of registration of scientific and technological achievements

Certificate of registration of scientific and technological achievements

A combined integrated outdoor fan protective cover - utility model patent certificate