A.1bar=14.5psi B.1bar=45psi C.1bar=29psi D.1bar=100psi
A.1bar=10kPa B.1bar=1000kPa C.1bar=1kPa D.1bar=100kPa
A.真空度 B.巴 C.磅每平方英寸 D.大氣壓