單位換算表 ... R 1 W/m ⋅ K = 0.5778 Btu/hr⋅ft⋅°F = 1.987 cal/g-mole. ... Joules = 3.086 ft-lbf 1 kg = 2.205 lb 1 hp-hr = 2.5445 × 103 Btu 1 lb = 453.59 g ...
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