To choose time is to save time; and an unseasonable motion is but beating the air.
选择时间就是节省时间；不合理的行动是打击空气的盲动。
To choose time is to save time; and an unseasonable motion is but beating the air.
选取时间就是俭约时间；不合理的行动是打击气氛的盲动。
Cold beating lead screw plays the role of high-speed relative motion in the way of high-speed blowing shaft blanks, so that local plastic deformation forms a non-chip metal forming technique.
丝杠冷打是在工具和丝杠高速相对运动中，以高速断续的方式击打丝杠轴坯，使丝杆轴坯局部塑性变形形成丝杠螺纹的一种无屑塑性成形技术。
The relation equation between the stylus beating frequency and the motion speed of printer head is derived from the analysis of the mechanism of stylus printer and validated by experience.
通过对打印机工作机理的分析，确定了打印机出针频率与打印头运行速度之间的关系。
Hence, this paper mainly focuses on the dynamic analysis of the two-side four-bar beating-up motion of an air-je.
介绍平移式后发动机舱门的结构及工作原理，四连杆机构尺寸的确定及动力学校核，以及空气弹簧、门锁的选用等。
Hence, this paper mainly focuses on the dynamic analysis of the two-side four-bar beating-up motion of an air-je.
介绍平移式后发动机舱门的结构及工作原理，四连杆机构尺寸的确定及动力学校核，以及空气弹簧、门锁的选用等。
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