... Ρα MPa psf psi Ρα MPa g / cc g / mm3 lb / ft3 g / mm3 1 = 1 = 175.126 11 N ... 27.6805 0.001 1 728 1.0E - 06 X Ib / in3 Х = Х kg / m3 X = Х х Х force lb ...
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