3 b% D' Y# E+ l3 l2 ~
长度单位:# `& j* }; ?' ~7 K4 ]8 t
1 in = 25.4 mm
1 ft = 0.3048 m
1 mile = 1609.3 m 8 t' Q- c! v' b! b
1 micron = 10-6 m
质量单位:
1 lb = 453.3 g6 \& I+ n3 Q N1 ~9 O$ y: P
1 cwt = 50.8 kg2 t8 N) Q. n+ k2 \2 ?& f
1 ten(imp) = 1016 kg
1 ton(us) = 907.2 kg. Y7 x7 {8 ^0 G
1 tonne = 1000 kg" s1 Q: g% Z! d- T# p
力矩单位:
1 inlb = 0.113 Nm
1 ft lb = 1.356 Nm
1 kgm = 9.807 Nm8 H$ E4 y4 T4 \; S
1 ft poundal = 0.0421 Nm% ~6 b6 g+ C8 s; x8 ^
$ u3 y1 Y7 |3 |% E8 V% P
功及能量单位:
1 lbft = 1.356 J
1 Nm = 1 J
1 kgm = 9.807 J
1 kW/hr = 3.6 MJ : ^- O$ \$ D1 v) k4 y
0 `) V% m3 D7 |8 `2 C
面积单位:& k+ n8 D, g/ T& N: s7 I/ r
1 in2 = 6.45 cm2$ e( O9 ?/ h/ ~3 S/ Z0 P. ~: y- E( q
1 ft2 = 0.093 m2* c B$ {- t5 S( T9 Z0 L6 b
7 Y- n# E) H8 j2 O" R' }
压力单位:( h- V8 j2 d2 n0 B
1 psi = 6.89 kPa2 X" n& P* W6 J+ {
1 kgf/cm2 = 98.07 kPa7 \2 G% T8 o/ l& Z+ f- O" }6 y5 }
1 bar = 100kPa" \# z' q8 A ]2 |5 m% _' ]
1 bar = 14.5 psi
1 atmosphere = 98.1 kPa
1"(标准) = 101.33 kPa% `0 O% t8 M2 F: a9 Q) I
1 厘米水压 = 97.89 pa
1 英寸水压 = 248.64 Pa% ~5 q- V6 `' [1 q' X3 k
1 毫米汞柱 = 133.3 Pa* V$ d8 O3 `" |. t2 y$ q v+ a
1 英寸汞柱 = 3.39 kPa
1 Torr = 133.3 Pa
1 英尺水压 = 0.0298 bar 2 g+ }5 W( U7 I2 t
1 bar = 33.33 英尺水压 8 U5 i* v! X5 P0 {
温度单位:& [6 y( u# R, Y5 \3 X* I3 @. B
(°F-32)×5/9 = ℃) Y6 @1 C) G! c3 z) s$ E: x) g' E
K - 273.48 = ℃7 E C+ i& Q; N+ \. T
" ]+ U2 v& [" a3 f2 O+ F* ^
体积单位:8 S( ~: T0 }7 t% b4 |$ h
1 litre = 0.001 m3( {7 l9 \ m, J S) V
1cu.ft. = 0.0283 m3
1 cu.in. = 16.39 cm3
1 gal(imp) = 4.546 L- a0 U' Q9 k! p0 [" C2 @0 Z1 _
1 fluid oz.(imp) = 28.41 ml6 Z/ U! b$ ~9 W$ x' }
1 fluid oz.(us) = 29.57 ml
力单位:
1 lbf = 4.45 N4 G- e* f/ Q5 P0 o N
1 kgf = 9.81 N
1 kp(kilopond) = 9.81 N
1 poundal = 138.3 mN+ |. o6 Q" U8 J0 f; F2 ^
1 ton force = 9.964 kN
功率单位:
1 lbft/sec = 1.356 W
1 kgm/sec = 9.807 W7 l, I; W9 }, ~8 h+ r
1 Nm/sec = 1 W
1 Joule/sec = 1 W
1 H.P.(imp) = 745.7 W
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