coffee forum, ?????, ?????, fresh coffee beans and tea house

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??c hing, ??????...??敎?敎....

???????expresso machine:
- Office Leva 2 (Vibration Pump)
- Office Leva 2 (Rotary Pump)

???????, ??????, vibration ?rotary ???...???clarify ??

1) ??c hing ?post ?Rotary????????, ???????? ??work?? ???draw back??

2) ???, ?vibration pumb ????????, ???????? ??, ???post ?????brew ??, ????, ?????, ?, ?d ?????????

3) ?????????, ?????, ????diamond water, ??c hing?????, ????????敎???

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