The coil workshop takes up more than 5,000 square meters, owns the most advanced high speed automatic coil punch line, the automatic tube bending and cutting line, the vertical tube expanding line, decreasing oven etc. The company owns the technology leading process equipment, the wave fins and the decreasing oven are firstly introduced into this field among domestic manufacturer. With advanced brazing process, which increased the product performance greatly, GUCHEN has made the vehicle air conditioning coils manufacturing to the leading position.