1公斤= 1 bar,1公斤= 0.1 MPa 1Mpa=0.1bar=0.0000001Mbar
1Mpa=10bar=10负5次方Mbar
1MPa=1000KPa=1000000Pa =1*10的8次方 mbar
1公斤= 1 bar ； 1公斤= 0.1 MPa 1bar=0.1mpa
