hollow punch 中文意思是什麼
hollow punch
解釋
沖孔空心沖頭-
In sheet metal, drawing is a process of forming flat sheet metal into hollow shapes by means of a punch that causes the metal to flow into the die cavity
在鈑金中,制圖的過程,就是將一個平鈑金沖壓成凹狀,通過一個沖孔使金屬流入型腔。
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