A.60° B.90° C.120° D.180°
A.单路电不切换 B.单Y型切换 C.H型切换 D.双Y型切换
A.110V B.220V C.380V D.410V
A.DC220+20-10V B.DC24+3.5-0.5V C.AC24±3V D.DC24～95±5V
A.10% B.15% C.30% D.20%
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