单 位 换 算
一．词头（次方）
10^12 = T (TERA) 10^9 = G (GIGA) 10^6 = M (MEGA)
10^3 = K (KILO) 10^2 = H (HECTO) 10 = DA (DEKA)
10^-18 = a (arto) 10^-15 = f (feamuts) 10^-12 = p (pico) 10^-9 = n (nano)
10^-6 = u (micro) 10^-3 = m (milli) 10^-2 = c (centi) 10^-1 = d (deci)
二．单位换算
长度LENGTH
公制：mm, cm, m, km
英制：inch, feet, yard 1 km = 1000 m = 10^6 mm 1 cm = 0.394 in = 3.28 x 10^-2 ft 1条/丝=0.01mm
1 mm=100条/丝
1 yd = 3 ft = 36 in
1 ft = 12 in 1 in = 25.4 mm = 2.54 cm
1 yd = 91.4 cm = 0.914 m
重量MASS
公制：g, kg, ton
英制：oz, lb 1 t = 1000 kg = 10^6 g
1 kg = 1000 g 1 g = 2.20 x 10^-3 lb
1 kg = 2.20 lb = 35.2 oz
1 ton = 2200 lb
1 lb = 16 oz 1 oz = 28.3 g
1 lb = 454 g = 0.454 kg
容积VOLUME (FLUIDS)
公制： ml, l, m^3
英制：fl-oz, pt, gal 1 m^3 = 1000 l
1 l = 1000 ml 1 l = 1.76 pt = 35.20 fl-oz
1 m^3 = 220 gal = 1760 pt
1 gal = 8 pt
1 pt = 20 fl-oz 1 fl-oz = 28.4 ml
1 gal = 4.546 l
1 pt = 568 ml = 0.568 l
温度TEMPERATURE 摄氏：℃= 5 / 9×(℉-32) 华氏：℉= 9 / 5×℃ + 32
压力(压强) PRESSURE
(P=F/A单位面积上的力)
公制：Pa, KPa, mm-Hg
英制：Psi, in-Hg … 1 Pa = 1 N / m^2
1 mm-Hg = 133.3 Pa 1 kg/cm^2 = 14.211 Psi
1 KPa = 0.145 Psi
1 mm-Hg = 1.935 x 10^-2 Psi
1 Psi = 1 lb / in^2
1 in-Hg = 0.491 Psi 1 Psi = 6.895 KPa
1 in-Hg = 25.4 mm-Hg = 3385.82 Pa
力 FORCE
N,1kg/f,lb/f 1 kg / f = 9.81 N
1 N = 0.102 kg / f 1 lb / f = 0.454 x 9.81 = 4.454 N
1 N = 0.225 lb / f
力矩 (扭力)
(力X长度) 1 kg-m = 9.81 N-m (牛顿米)
1 N-m = 8.85 in-lb 1 in-lb = 1.152 kg-cm = 0.113 N-m
1 ft-lb = 12 in-lb
附: 集装箱货柜内部尺寸参考值: (供仿真装柜箱数换算用)
类型 限重 kgs 长=深(cm) 宽(cm) 高(cm) 一般材数CUFT 一般材数CBM
20' 18000 580 234 238 1000' 28
40' 19500 1185 234 238 2000' 56
40' HQ 19500 1185 234 270 2350' 65
45' 19500 1343 234 270 2650' 75 |
发表于 2009-11-11 23:59:49
