Hebei Shenatian Group ????? Seam Steel Pipe Co., ?. ??? ?????? ?? ????? ??????? ???? Cangzhou ?????, ??? ?? ???? ?????? ????????? ???? ???????? ???????? ??? ??? ??? ??? ?????? ?? ????? 1990, ?????? ???? 85,000 ?????? ????? ??? ?????????? ??? 200 ???????? RMB ? ???? ??? ????? ??? ????????? ????? ??? ?????? ?????? ????????? ???? ??? ??? ???? ??? ?????? ?????? ???????? ? ??? ??? ?????? ???????? ????????? ?????? ?????????? 1S09001,1S014001 OHSAS 18001 ????? ???????? ????????? ?????? ??? ?????????? ???? ??????????, ??????? ???????? ???????? APl 5L, APl 5CT ??? ???????????? ???? ?????? ????? ???? ????? ??? ?????? ???? ???? ???? ??? ? ???????? ?????? ??????