The kinematically admissible velocity field for the indentation of semi infinite medium by a round flat punch has been established.
建立了圆冲头压入半无限体的运动许可速度场；
He knocked me flat with one punch.
他一拳把我打倒。
But do not use cold water spilled punch, don't put gas, it could lead to a flat tire on the early damage and the tires.
但切忌用冷水泼冲，更不要放气，否则会导致途中爆胎和轮胎的早期损坏。
The world is flat, the network is open. Don't count on you always having the Sunday punch that others don't have.
世界是平的，网络是公开的，不要指望自己一直拥有别人没有的杀手锏，稍微做得好一点，全村都盯着你、模仿你。
In sheet metal, drawing is a process of forming flat sheet metal into hollow shapes by mean of a punch that causes the metal to flow into the die cavity.
在板金上，拉伸是一个通过冲床将平板金属冲入模腔拉成中空形状工件的工艺过程。
In sheet metal, drawing is a process of forming flat sheet metal into hollow shapes by mean of a punch that causes the metal to flow into the die cavity.
在板金上，拉伸是一个通过冲床将平板金属冲入模腔拉成中空形状工件的工艺过程。
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