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鋼的密度為:7.85g/cm3 圓鋼盤條(kg/m) W= 0.006165×d×d 螺紋鋼(kg/m) W= 0.00617×d×d d=斷面直徑mm 斷面直徑為12 mm的螺紋鋼,=0.00617×12 2=0.89kg
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