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單位:Kg/m 壁厚 外徑3 3.5 4 4.5 5 5.5 6 32 2.146 2.46 2.762 3.052 3.329 3.594 3.847 38 2.589 2.978 3.354 3.718 4.069 4.408 4.735 42 2.885 3.323 4.044 4.495 4.932 5.358 5.771 45 3.477 4.014 4.538 5.049 5.549 6.036 6.511 50 3.773 4.359 4.932 5.493 6.042 6.578 7.103 54 3.995 4.618 5.228 5.826 6.412 6.985 7.546 57 4.217 4.877 5.524 6.159 6.782 7.392 7.99 60 4.476 5.179 5.869 6.548 7.214 7.867 8.508 63.5 4.80