????? ???? ???????? ????? ??? ???? ???????? ??????? ????? ?????????? ????? ????? ?????? ?????? ???????
: ??? ???? ?????????? ???? ??????? ??????? ??????? ???????? ??? ???? ???? ?? ??? fields.Currently ???? ??????? ?? ???? ???? ?????????? ???? ??? ??????? ???????????? ?????? ??? ?????? ?? ?????? ????? ???? ???? ???????? ?? ???? ???????? ???????? ??? ???? ???? overseas.However? ??????? ???????? ?????? ?????? ?? ???? ?????? ?????? ???? pump.In ?????????? ?????? ???? ????? ?????? ???? ??????? ??????????? ??????? ?????? ??????? ???? ????? ??????? ??????? ???? ?????????? ?? ????? ????? ?????? ??????? ??? ?????? ?????? ????? ???? ???????? field.According ??? ????? ????????? ?? ?????? ?????? ????? ????? ????? ?? ??????? ????? cavitation.Based ??? ????? ?????? ??????? ????? ??? ?????? ???? ????? ????? ???? ?????????? ?? ???? ????? ????? ?? ???? ???? ???? ????? ?? ?????? ?? ??? ??????? ???????? ?????? ????????????? ?????? ??????? ?????? ??????????? ??????? ????? ?????? ?? ????? ?????? ??? ????? ???? ?????????? ?? ????? ????? speeds.In ???????? ?????????? ?? ?????? ????? ??? ????? ?? ?????? ????? ????????? system.Pressure ????? ???? ?? ???? ????? ?? ????? ???? ?????????? ?????? ??? ????? ??????? ?? ??? ???? ?? ???? ??? ????? ?????? ?? ???? ???? ????? ?????? ??? ?????? ?????? ?????? ???? . ????? ????? ???????? ??????? ?????? ??? ??? ??? ?? ????? feasible.The ????? ?????? ?????? ???? ??????? ?????? ????? ?????? ???? ??????? ??????????.
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2012-03-20