In the production of construction or repair work is necessary to use the platform and the supporting part to them — goats. However, the latter is usually calculated at a certain fixed height, and work on them is not always convenient.
I use them instead of the two step-ladders. Changing the location of the platform on the steps, adjust the height as needed.
Recommend to read
UNIVERSAL LEVEL
It is arranged simply: two glass tubes with a length of about 100 mm, diameter of inner hole at least 10 mm, and two lines of hose with a length of about 600 mm each. Connect it all as...
CYBERNETIC ARBITRATOR
A variety of machines are used to evaluate sports competitions. Automatic light displays have become commonplace at hockey games and at competitions of figure skaters and boxers,...
