The apparatus for a vertically cannon boring.
Engraving depicting the apparatus for a vertically cannon boring. Boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a gun barrel or an engine cylinder. Dated 19th Century.
Universal Images Group
3740 x 5607 pixels
Print Size @ 300 dpi
12 x 19 inches / 32 x 47 cm
Model No you may not need it
Property No you may not need it