单项选择题
A.18mm B.20mm C.31.8mm D.35mm
A.≤5mm B.≤8mm C.≤10mm D.≤12mm
A.IP32 B.IP44 C.IP54 D.IP60
A.36V B.110V C.220V D.380V
微信扫一扫,加关注免费搜题