... . At the early age, we manufactured 220V AC compressor for water dispenser use. From the year ... 2001, we started to develop and manufacture DC compressor. During the last 10 years manufacturing period ... we have the product range including 12V,24V,36V and 48V DC compressors. These compressors can be used ... degree to 10 degree. Now, Colku's DC compressors have achieved CCC,CE certificates and mainly ...