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.
Recommend to read
Sandwich chimneys: design and benefits
One of the essential elements of the furnace chimney. With its help output products of combustion. Such an element can be of different types. Now widespread sandwich chimneys, which are...
THE SECOND “BREATH” BIRDS
First image of indoor model airplanes made of bird feathers, I saw in the years of the great Patriotic war, even as a boy. Father was at the front, and my mother and my younger sister...
