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By certification 
Material: aluminum
Technology: forging+anodizing bule
Advantage:
1. High surface area heatsink
2. Many materials can be used
Disadvantage:
1. Tooling cost is high
Technology: forging+anodizing bule
Advantage:
1. High surface area heatsink
2. Many materials can be used
Disadvantage:
1. Tooling cost is high
