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By certification 
Material: copper
Technology: skived fin+ cnc machining
Advantage:
1. Fast prototyte without tooling cost
2. The heat could be conducted very fast from the base to fins due to single body
Disadvantage:
1. Just for simple shapes
Technology: skived fin+ cnc machining
Advantage:
1. Fast prototyte without tooling cost
2. The heat could be conducted very fast from the base to fins due to single body
Disadvantage:
1. Just for simple shapes
