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The concept of ‘SPIN’ is enjoy 2 different of coffee at the sametime.
For example, let’s think that there are two people drinking coffee at the table
who each think "I always drink only blue mountain coffee"and
"I always drink only kona coffee" Therefore I suggest a diverse of new
methods of coffee maker also using this methods we can solve that problems.
Donga-A.univ
Busan, South Korea