Siam Engineer ???? ????? ???? ??????? ???????????????????? ?????? ?????? ???????? ????? ?? ????????? ?????? ?????????????? ??????? ????? ????? ???? ????????????? Hybrid Heat-Pump ??????????? ????? ????????? ????? ??????????? ??????????? ????????? ??????????????? ????????????? ??????? “Siam Green Engineer” ?????????? “????” ?????