A.0.01% B.0.05% C.0.1% D.0.2%
A.500ppm B.5ppm C.100ppm D.50ppm
A.超壓現(xiàn)象 B.超溫現(xiàn)象 C.負(fù)壓現(xiàn)象 D.液泛現(xiàn)象