Report - 配管用炭素鋼鋼管 (SGP)JⅠSG34521997 劔 …...4 圧力配管用(STPG)高圧配管用(STS)高温配管用炭素鋼鋼管 JⅠSG3454-1988JⅠSG3455-1988JⅠSG3456-1988 呼び径

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