2020??11??6???????????ó??????ITC????????????й?????????Oil Country Tubular Goods??????????η????????臨??????????????????????????з?????????????????????????????????永?????????????????????????????????????????????????????y???????????з?????????????????????Ч??????????У?5??????????ó?????????????????

2009??5??5??????????????????棬????????й?????????????з???????????????????顣2009??11??24??????????й??永???????????????á?2010??4??9??????????й??永???????????????á?2014??12??1???????????????й????????????????????????????????臨?????????顣2020??4??1???????????????й????????????????????????????????臨?????????顣2020??6??29???????????????й??????????????????????ο??????臨??????????????з???????????й??永???????????20.90%~26.19%????????????????????

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