单项选择题
A.0.8s B.0.9s C.1.1s D.1.2s
A.静接点片 B.静接点座 C.静接点组 D.静接点
A.1.35Ω±0.0675Ω B.2.3501Ω±0.0675Ω C.1.258Ω±0.0677Ω D.3.35Ω±0.0675Ω
A.HRC40～45 B.HRC45～50 C.HRC50～55 D.HRC55～60
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