A.0.95 B.0.98 C.0.99 D.0.999
A.0.02HZ-0.2HZ B.0.2HZ-2HZ C.2HZ-20HZ D.0.2HZ-20HZ
A.1%、2.5% B.1%、0.25% C.2%、-0.25% D.1%、±0.25%