ARTICLE
Recommend to read
A LADDER MADE OF… KNOTS
Both during construction and during further operation or repair of an individual or country house, a special ladder is needed for work on the roof, preferably wooden, with an L-shaped end...
Mil Mi-1
When in 1947 the head of the laboratory helicopteros Department of TSAGI Mikhail mil proposed for consideration of the interdepartmental Commission on development of the helicopter in...
