Convenient cassette for storing drills will work if household plastic jar with a simple screw-cap or paste is processed under the dimensions for hardwood timber with pre-drilled blind holes of different diameters. If the timber is inserted into the jar tightly enough, it can be pasted.
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Mini all-purpose unit
For many operations performed in training workshops and technical clubs, a portable universal tool similar to a dental drill would be very convenient. However, it is almost impossible to...
