题目内容

螺栓连接的类型有( )。

A. 螺栓联接
B. 双头螺柱联接
C. 螺钉联接
D. 紧定螺钉连接

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广泛应用于紧固连接的螺纹是( )螺纹,而传动螺纹常用( )螺纹。

根据螺纹牙型的不同,可分为( )螺纹、( )螺纹、( )螺纹和( )螺纹。

螺栓预紧的目的是:增强联接的( )、( )和( )。

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A. She wants the man to go by himself.
B. The policeman maybe know the way.
C. The park is near the police station.
D. The man should ask the policeman to go.

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