ASTM A 387/A 387M-03 压力容器用铬钼合金钢板的标准规范 ASTM A387 ASTM A387/A387M-2003 ASTM A 387/A 387M-2003 ASTM A387/A387M-03 ASTM A387/A387M-03 ASTM A 387-70 TENTATIVE SPECIFICATION FOR CHROMIUM-MOLYBDENUMM STEEL PLATES FOR B。
等级不一样