Drill from wide steel, 1932
This drill from wide steel was suitable thank to its hardness for processing materials such as glass. This is demonstrated by the drill holes in the glass block
Picture No
10526829
Media ID
48150073
Size
1929px x 2640px
(1.5MB)
Credit
Mary Evans / SZ Photo / Scherl
Date
1932
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Demonstrated Drill Hardness Holes Mineral Processing Suitable Thank
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