A.爬电距离≥8.5mm,空气间隙≥8.5mm B.爬电距离≥6mm,空气间隙≥6mm C.爬电距离≥6mm,空气间隙≥8.5m D.爬电距离≥8.5mm,空气间隙≥6mm
A.≥2.0mm B.≥3.0mm C.≥3.5mm D.≥4.0mm
A.≥3mil B.≥4mil C.≥5mil D.≥6mil