机械加工工艺过程是利用机械加工方法,改变毛坯的几何形状、尺寸、加工精度和表面粗糙度,使之成为合格零件的过程。
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Which of the following statements about pump operations is NOT a correct statement?()
A. In order for a fluid to be pumped, a fluid must be made to flow
B. A substance must be cold in order for it to be pumped
C. The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic system
D. A pump must receive its energy from an external source
在平面布置图上表示各构件尺寸和配筋的注写方式有()。
A. 平面注写方式
B. 列表注写方式
C. 截面注写方式
D. 立面注写方式
党员受到严重警告处分的,()内不得在党内提升职务。(第九条)
A. 1年
B. 一年半
C. 2年
D. 3年