???? ?????? ????? LF2 ????? ?????? | ?????? ??? ???? ????

?? ????? ???? ??????? LF2 ????? ???? ???? ?? ?????? ?????? Shijiazhuang Deye Piping Idndustrys Co.,Ltd.? ?????? ???? ???? ?????? ?? ?????? ?? ???? ???? ?? ????????? ????????. ????? ?? ????? LF2 ???? ??????? ???? ??? ?????? ?????? ?????? ?????? ??????? ??? ???? ???? ???? ????? ?? ??????? ??????? ???? ????? ?????? ??????? ???????? ???? ???? ??????? LF2 ????? ??? ??????? ?????????? ?????? ????? ?????? ??? ????? ???? ????? ????????? ?????? ??? ?? ???? ?????? ??????. ?? ????? ?????? ??????? ?? ????? ??????? ??????? ???????? ??? ????? ??????? ????????? ?? ????? ???????? ??? ?? ??? ?????????????? ?????? ?????? ?????? ?????? ???????. ???????? ??? ???? ????? ???? ??????? LF2 ????? ??? ?? ?????? ?????? ?? ??????? ??????? ????? ?????? ??????? ????? ???????? ???????? ?????????? ?????????. ??? ?? ?????? ?????? ??????? ????????? ?????? ??? ?????? ?? ????? ?????? ????????? ????????? ???? ???? ???? ???? ??????? LF2 ????? ??? ????? ??????? ???????? ?????? ??? ????? ?????? ?????? ????? ?????? ?? ?????? ?? ??????? ???????? ??????.