28 10, 2012 ASTM A53 Grade B, SMLS and Welded Pipe ASTM A53 Grade B, SMLS and Welded Pipe steelmax2023-01-13T13:37:03+09:0010월 28th, 2012| ASTM A53 Grade B, SMLS and Welded Pipe STEELMAX Steel Story ASTM A53 은 배관용 탄소강과 또는 압력배관용 탄소강관에 글 내용 전체보기