強度, ksi (=1000psi), psi, kgf/mm2, N/mm2 (Mpa). 1, 1000, 0.70307, 0.3048. 0.01, 1, 0.703070×10-4, 6.89476×10-3. 1.42233, 1422.33, 1, 9.80665.
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