1s = 1000 ms
= 1000 000 us
= 1000 000 000 ns
= 1000 000 000 000 ps
1mil=0.0254mm=25.4um
100mil=2.54mm
1mm=39.37mil
1inch=1000mil=25.4mm
1 foot = 12 inch = 304.8 mm=30.48 cm
市制单位中,1尺 = 1/3米 = 33.3 cm,二者差不多
1s = 1000 ms
= 1000 000 us
= 1000 000 000 ns
= 1000 000 000 000 ps
1mil=0.0254mm=25.4um
100mil=2.54mm
1mm=39.37mil
1inch=1000mil=25.4mm
1 foot = 12 inch = 304.8 mm=30.48 cm
市制单位中,1尺 = 1/3米 = 33.3 cm,二者差不多