A.dBi=dBd+2.15 B.dBd=dBi+2.15 C.dBi=dBd+3.15 D.dBd=dBi+3.15
A.2 B.4 C.6 D.8
A.-25℃~50℃ B.-15℃~50℃ C.-5℃~60℃ D.-15℃~60℃