Suitable for such products as the home air conditioner , central air conditioner and show case ,etc. , two device wing slices coming out in production, arrange accurate , blow solid very, slice from even, two turn-ups external diameter is it curve corner R0.4 only to roll over, and ordinary two external diameter minimum to is it curve horn R0.6 , so it exposed to area constant traditional wing slice increase 14% to roll over turn-ups that mould go out, the result increases by 10% too to conduct heat, it is obviously superior to the like product to change the hot result.