UNIT 1 INTRODUCTION TO TOOL Introduction to Tool ...
2011-1-13u2002·u20021000 -1BC Improved chisel, saws, files, wood working lathes AD 1-1000 Etching of armor ... Smaller size solid bit are usually held in tool holder. This type of tool is tipped up to an angle from 15° to 20°. High speed steel and cast alloy tools are commonly categorized into solid
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