A.0.5mm B.0.3mm C.0.6mm D.0.4mm
A、4 B、6 C、8 D、10
A.DC1800V B.DC2000V C.DC2200V D.DC2400V
A.25km/h B.35km/h C.45km/h D.55km/h
A.20 B.22 C.25 D.28
A.沉头或半沉头螺钉 B.方头螺钉 C.无头螺钉 D.盘头螺钉
