... steel body 2,Speed cooling,high prodcution 3,With high quality 4,2+1mixed flavors Ice cream ... pressure etc.Options:a) Air Pump(Model number with letter"P") Grand mix with more air to a sofer and ... mixture material b) Pre-cooling system(Model number with letter"M") Separate hopper refrigeration,by separate compressor ... 4.5°Cc) Keep fresh system(Model number with letter"M1") During long no-use periods,the ...