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47. 当键联接强度不足时可采用双键。使用两个平键时要求键( ) 布置。

单选题
2021-09-01 19:11
A、在同一条直线上
B、相隔90°
C、相隔120°
D、相隔180°
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正确答案
D

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当键联接强度不足时可采用双键。使用两个平键时要求键( )布置。 
当键联接强度不足时可采用双键。使用两个平键时要求键( )布置。
47. 当键联接强度不足时可采用双键。使用两个平键时要求键( ) 布置。
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