Hebei shenatian Group Seamless STEEL PIPE Co., Ltd. ?????????? Historical City of Cangzhou City ??????????????????????????????????????????????????????1990???????????????85,000??????????????????????????200????????????????????????????????????????? commited ??????????????????????????????????????????????????????????????????????????1S09001???????????????????1S014001???????????????????????? OHSAS 18001??????????????????????????????????????????, american Petroleum Institute APL 5L, 5CT APL ?????????????????, ??????? "Yilin" ??? "stwfgg" ??????????????????????????????????????????????????????????????????????????300,000???