问题
单项选择题
键“B18—100”的标注中，“18”的含义是（）。
A.平头普通平键
B.键宽18mm
C.键长18mm
D.圆键
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
键“B18—100”的标注中，“18”的含义是（）。
A.平头普通平键
B.键宽18mm
C.键长18mm
D.圆键
参考答案：B
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