Sometimes the drills, especially in the already served, without distinction, the marking indicating the diameter. It would seem that to define it is only possible with a micrometer. But here’s a simple and fairly accurate method of measurement with… grip. Drill clamped in their jaws, and remaining between them a gap corresponding to the diameter of the already available ordinary ruler with millimeter divisions.
Recommend to read
TORPEDO, GUN OR MINE?
Fighting submarines "against all" (and basically struggle with the poor merchant ships), turned around after only a few months after the outbreak of the First world war. For four years,...
A SIMPLE PERISCOPE
In childhood, many have probably experienced the delight of the books of Jules Verne. The romance of traveling on the Nautilus is impossible to forget even after years. Today the...
