单项选择题
A.1mm±0.1 B.1mm C.1.2mm
A.134齿 B.60齿 C.120齿
A.-11VDC B.-10VDC C.-12VDC
A.正常门对应开度为100％危急门对应开度为0％ B.正常门对应开度为0％危急门对应开度为100％ C.正常门对应开度为100％危急门对应开度为100％
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