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【单选题】
下列标准件中,能够防止轴或轴上零件的轴向移动的 是 ( ) 。
A.
轴用弹性挡圈
B.
孔用弹性挡圈
C.
圆螺母止动垫圈
D.
以上都不是
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】In the last two hundred years there have been great changes in the method of production of goods. This is now also true of the building industry; for mechanization has been introduced. System building...
A.
the latter uses ready-made internal features
B.
panels are cast in a level position
C.
the former is used to build walls and floors while the latter to construct bathrooms or bedrooms
D.
the former is more expensive than the latter