单项选择题
A.0.15mm B.0.2mm C.0.3mm D.0.35mm
A.0.6mm B.1mm C.1.2mm D.1.3mm
A.24V B.27V C.50V D.220V
A.0.6s±0.01 B.0.6s±0.02 C.0.65s±0.01 D.0.65s±0.05
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