7304.31.40

HS 编码 7304.31.40（第 73 章「钢铁制品」；品目 7304「钢铁制(铸铁除外)无缝管材及空心型材」；子目 730431「其他圆截面钢铁或非合金钢制」）在菲律宾税则中对应"- - - Other, having an external diameter of less than 140 mm and containing less than 0.45 % by weight of carbon"。