A.10000Bq/m3 B.20000Bq/m3 C.50000Bq/m3 D.100000Bq/m3
A.≤0.8 B.≤1.0 C.≤1.2 D.≤1.3
A.1 B.2 C.3 D.5
A.99% B.99.9% C.99.99% D.99.999%