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.
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FROM A SIMPLE — SPRINGY
If you want ordinary "card" loop was samarastroydetal like spring-loaded, easy to upgrade. For this of eyes loop is extracted axial rod, and the reverse installation is put one or two...
TRACTOR
At school, for more than 40 years, engaged in the construction of various mechanisms to facilitate workplace and at home. (In the journal "Inventor and rationalizer" was placed in my...
