Now, almost everywhere applied electronic machines and appliances, the programme of work which is carried out by using perforated paper tapes and cards. Therefore, it is easy from already used punch cards to pick up where the holes were located in one row. Essentially, this is a ready device for drawing dashes: apply to the centers of the holes, a ruler and a pencil or pen — under the card will remain clear dotted line.
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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...
THE LACES FROM THE HATS…
Sometimes it is difficult for the elderly person to tie a shoelace. To help out maybe round hat elastic, forever laced and tied. After this improvement, the boots are easy to put on with...
