精品文献
美标管帽
美标管子规格对照表
公制 mm 管径（英） INCH 管径（公制） mm 壁厚 mm 备注 10S φ17.1×1.65 3/8" φ17.1 1.65 40S φ17.1×2.31 3/8" φ17.1 2.31 80S φ17.1×3.20 3/8" φ17.1 3.20 STD φ17.1×2.31 3/8" φ17.1 2.31 40 φ17.1×2.31 3/8" φ17.1 2.31 XS φ17.1×3.20 3/8" φ17.1 3.20 80 φ17.1×3.20 3/8" φ17.1 3.20 5S φ21.3×1.65 1/2" φ21.3 1.65 10S φ21.3×2.11 1/2" φ21.3 2.11 40S φ21.3×2.77 1/2" φ21.3 2.77 80S φ21.3×3.73 1/2" φ21.3 3.73 STD φ21.3×2.77 1/2" φ21.3 2