the cost of spare parts for the Electric h2o Heater is supplied, deducting the worth from the pre-examination ??? ??????? ???? ?? ?? ??? ??????? ???? ?? ????? ??? ??????? ???? ?????? ??? ??? ?????? ???? ?????? ????? ????? ???? ??? ??? ???? ??? ???????? ??? ??? ???? ?? ?? ??? ??????? ?? ??? ???????? ??? ??? ????? ????? ??????? ??????? ???? ???? ?