
As the Russian proverb says, “water will find a hole”. And one that cannot be detected “by eye”. Help out in this case a bucket of water. Drop it into a “soggy” boot and squeeze, tightening the top shaft: emerging air bubbles from the holes will be given where it “hides”.
Recommend to read
MODEL ROCKET GLIDERS
Category S4. The rocket plane is an aircraft that is lifted into the air using the thrust of the rocket engine, and returns to earth planning with the engine off — using the aerodynamic...
A COMPACT CAR FOR THE BIG CITY
Ask car enthusiasts about which meaning is embedded in "tree" — the emblem of the famous French firm Citroen and you will get a variety of answers. And, maybe one out of ten say that the...