| we can supply air ductHere are brief introduction of our company:Yuyao East ventilation Engineering Company Limited is specialized in producing spiral pipe(Sprial ducts) and accessories manufacturers.(Beijing 2008 Olympic Games spiral pipe product supply). We have the most advanced companies Switzerland SPIRO full metal spiral duct and accessories production lines Products are widely used in air conditioning, airports, shipbuilding, exhibition, Coliseum .,etdwe are main spiral pipe & fitting manufactory in china which is BeiJing OL GAME Supply.Also We have the most advanced companies Switzerland SPIRO full metal spiral duct and accessories production lines, so have good quality!Air duct size:80-1600mm material:zinc coating & stainless steelOur Website:www.dftf.com.cn | 
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