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[re]===================================================== 1 mile = 1.4 km 1 yard = 3' = 0.9144 m 1 ac = 0.4047 ha = 4047 sqm = 43560 sf 1 ha = 2.47 ac 100 sqf = 0.0029 ac sqm / 3.3 > Æò 1 kg = 2.2 lb (ÆÄ¿îµå) social distance = 4' - 12' 1 board feet = 1' length x 1' width x 1" nominal thickness of lumber volume (F-30) / 2 = C (C*2) + 30 = F
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