A.0.3~1.0m B.0.6~1.5m C.1.2~2.0m D.0.9~1.0m
A.0.5m B.0.75m C.1.2m D.2m
A.R³100Ω或R³1kΩ擋 B.R³1Ω擋 C.R³10kΩ擋 D.R³100kΩ擋