A.80% B.85% C.90% D.95%
A.塵埃微粒的組成 B.塵埃微粒的配比 C.塵埃微粒的化學成分 D.塵埃微粒的粒徑
A.0.05Mpa B.0.1Mpa C.0.2Mpa D.0.5Mpa